<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:b8cf5385-7cc7-46fb-9092-f61ecb4aa8a5,g:2cc86a61-98b2-4462-8ce4-4eb7ac71c54b-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedBalanceSheets" xlink:type="extended" id="i8ac44545bd374f15b69bb2c98082b0b1_ConsolidatedBalanceSheets">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_c5739625-ba88-4fa3-9561-54d716c82324" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_c5739625-ba88-4fa3-9561-54d716c82324" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesHeldInEmployeeTrustShares_517ff509-684f-40a1-b549-107418d8fa7b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesHeldInEmployeeTrustShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_CommonStockSharesHeldInEmployeeTrustShares_517ff509-684f-40a1-b549-107418d8fa7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_2cd9d814-be12-412e-b22e-f0bd7cccfbe4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_2cd9d814-be12-412e-b22e-f0bd7cccfbe4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_db940a0a-6b21-453b-9870-79e7ca644213" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_db940a0a-6b21-453b-9870-79e7ca644213" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_552c88d8-91e5-43b0-8a7f-7cb93a2a7460" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_552c88d8-91e5-43b0-8a7f-7cb93a2a7460" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_acb2a5cc-1e9a-499d-9bbe-1784acf279b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_CommonStockSharesIssued_acb2a5cc-1e9a-499d-9bbe-1784acf279b9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_3c839aea-933b-40b4-b1b0-b55b00405bdb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_3c839aea-933b-40b4-b1b0-b55b00405bdb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_160feb65-8d48-426b-97b0-4652ff123472" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_160feb65-8d48-426b-97b0-4652ff123472" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent_51b9bda0-d07e-442d-a070-d23f3afedffc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent_51b9bda0-d07e-442d-a070-d23f3afedffc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_24491b77-9d66-47bc-af00-da5da9e974ff" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_24491b77-9d66-47bc-af00-da5da9e974ff" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_34863dc3-c460-4576-8b78-63aa443d71bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_34863dc3-c460-4576-8b78-63aa443d71bb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_cccd52c9-6a95-46c3-af3e-d687434d8b39" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_AccountsReceivableNet_cccd52c9-6a95-46c3-af3e-d687434d8b39" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostMethodInvestmentsOriginalCost_451adc86-a165-44f7-bd5d-b737bf4225e8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostMethodInvestmentsOriginalCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_CostMethodInvestmentsOriginalCost_451adc86-a165-44f7-bd5d-b737bf4225e8" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_b2eda3bd-3139-4e4d-93cf-b791ec646f7e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_b2eda3bd-3139-4e4d-93cf-b791ec646f7e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_2c65a5d7-1d0e-43a8-a0f8-d8ece099634f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_b5004100-efd7-48b7-87d0-a0423384f9c2" xlink:to="loc_us-gaap_StatementTable_2c65a5d7-1d0e-43a8-a0f8-d8ece099634f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_5bc134a7-5115-4783-88bb-bc704ba75d0e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2c65a5d7-1d0e-43a8-a0f8-d8ece099634f" xlink:to="loc_srt_StatementScenarioAxis_5bc134a7-5115-4783-88bb-bc704ba75d0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_5bc134a7-5115-4783-88bb-bc704ba75d0e_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_5bc134a7-5115-4783-88bb-bc704ba75d0e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_5bc134a7-5115-4783-88bb-bc704ba75d0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_67a9fb3e-957a-455c-a142-6871aed8f9e7" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_5bc134a7-5115-4783-88bb-bc704ba75d0e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_67a9fb3e-957a-455c-a142-6871aed8f9e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_c990ee0b-8eef-4ada-a595-2ffd03c24e2f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2c65a5d7-1d0e-43a8-a0f8-d8ece099634f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_c990ee0b-8eef-4ada-a595-2ffd03c24e2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c990ee0b-8eef-4ada-a595-2ffd03c24e2f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c990ee0b-8eef-4ada-a595-2ffd03c24e2f" xlink:to="loc_us-gaap_ClassOfStockDomain_c990ee0b-8eef-4ada-a595-2ffd03c24e2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_7a93a3d2-d51b-48a1-baab-85c0a3fe01aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c990ee0b-8eef-4ada-a595-2ffd03c24e2f" xlink:to="loc_us-gaap_ClassOfStockDomain_7a93a3d2-d51b-48a1-baab-85c0a3fe01aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_47cee764-1c18-44ba-a140-483b45e5c5e5" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2c65a5d7-1d0e-43a8-a0f8-d8ece099634f" xlink:to="loc_dei_LegalEntityAxis_47cee764-1c18-44ba-a140-483b45e5c5e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_47cee764-1c18-44ba-a140-483b45e5c5e5_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_47cee764-1c18-44ba-a140-483b45e5c5e5" xlink:to="loc_dei_EntityDomain_47cee764-1c18-44ba-a140-483b45e5c5e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_db01da8f-f26c-4daa-9830-abe1e1ad786b" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_47cee764-1c18-44ba-a140-483b45e5c5e5" xlink:to="loc_dei_EntityDomain_db01da8f-f26c-4daa-9830-abe1e1ad786b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_KaleoMember_f042233e-4256-4fed-9c64-8b3d9c06ca26" xlink:href="tg-20210630.xsd#tg_KaleoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_db01da8f-f26c-4daa-9830-abe1e1ad786b" xlink:to="loc_tg_KaleoMember_f042233e-4256-4fed-9c64-8b3d9c06ca26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_c66ec444-3f96-4c77-bc98-1fffb061fac8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2c65a5d7-1d0e-43a8-a0f8-d8ece099634f" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_c66ec444-3f96-4c77-bc98-1fffb061fac8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_c66ec444-3f96-4c77-bc98-1fffb061fac8_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_c66ec444-3f96-4c77-bc98-1fffb061fac8" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_c66ec444-3f96-4c77-bc98-1fffb061fac8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_328186f6-b88b-45ce-807a-9d734ca48b90" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_c66ec444-3f96-4c77-bc98-1fffb061fac8" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_328186f6-b88b-45ce-807a-9d734ca48b90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_OtherAccruedExpensesMember_62094625-5c0c-4e82-af7f-13aef85d78b0" xlink:href="tg-20210630.xsd#tg_OtherAccruedExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_328186f6-b88b-45ce-807a-9d734ca48b90" xlink:to="loc_tg_OtherAccruedExpensesMember_62094625-5c0c-4e82-af7f-13aef85d78b0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedBalanceSheetsParenthetical"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" id="i893307218fed443ca801d9ad2b475bb9_ConsolidatedBalanceSheetsParenthetical">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_643ff20e-8e97-488e-ab6b-6290b5bd005f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostMethodInvestmentsOriginalCost_71debdc9-d40f-4bba-adb5-2d4f48ebaef9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostMethodInvestmentsOriginalCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_643ff20e-8e97-488e-ab6b-6290b5bd005f" xlink:to="loc_us-gaap_CostMethodInvestmentsOriginalCost_71debdc9-d40f-4bba-adb5-2d4f48ebaef9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_62514d8a-4586-4ebe-9478-ec7d6165e046" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_643ff20e-8e97-488e-ab6b-6290b5bd005f" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_62514d8a-4586-4ebe-9478-ec7d6165e046" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_79272d48-46bc-4d1b-8a56-6b728540d1df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_643ff20e-8e97-488e-ab6b-6290b5bd005f" xlink:to="loc_us-gaap_StatementTable_79272d48-46bc-4d1b-8a56-6b728540d1df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_d1289874-def6-45a5-8fbd-40209802fc87" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_79272d48-46bc-4d1b-8a56-6b728540d1df" xlink:to="loc_dei_LegalEntityAxis_d1289874-def6-45a5-8fbd-40209802fc87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d1289874-def6-45a5-8fbd-40209802fc87_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_d1289874-def6-45a5-8fbd-40209802fc87" xlink:to="loc_dei_EntityDomain_d1289874-def6-45a5-8fbd-40209802fc87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_bcc5094d-4c6b-419c-b849-c43eec9f49c8" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_d1289874-def6-45a5-8fbd-40209802fc87" xlink:to="loc_dei_EntityDomain_bcc5094d-4c6b-419c-b849-c43eec9f49c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_KaleoMember_a00c575e-8970-4cbf-937c-0caac51adb85" xlink:href="tg-20210630.xsd#tg_KaleoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_bcc5094d-4c6b-419c-b849-c43eec9f49c8" xlink:to="loc_tg_KaleoMember_a00c575e-8970-4cbf-937c-0caac51adb85" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedStatementsOfIncome"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended" id="ic7f2dfc8f9c349ea8e9ed0e09fd2ff1c_ConsolidatedStatementsOfIncome">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_GrossSales_c129e2a1-aa6d-424d-8cce-ffef95f67ecf" xlink:href="tg-20210630.xsd#tg_GrossSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_tg_GrossSales_c129e2a1-aa6d-424d-8cce-ffef95f67ecf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_7733c1ad-eea4-48cf-8f5e-b65c5778c567" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_RevenuesAbstract_7733c1ad-eea4-48cf-8f5e-b65c5778c567" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_ff8c006b-0487-4a69-ae3e-932afdb8e826" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_7733c1ad-eea4-48cf-8f5e-b65c5778c567" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_ff8c006b-0487-4a69-ae3e-932afdb8e826" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TotalRevenuesNetOfOtherExpenses_064b9c79-414c-429d-962b-a186dadca314" xlink:href="tg-20210630.xsd#tg_TotalRevenuesNetOfOtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_7733c1ad-eea4-48cf-8f5e-b65c5778c567" xlink:to="loc_tg_TotalRevenuesNetOfOtherExpenses_064b9c79-414c-429d-962b-a186dadca314" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_63d549c6-6cf6-4248-9884-03dd6564f2ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_63d549c6-6cf6-4248-9884-03dd6564f2ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_dfebbd16-85e9-42a8-b0ee-622202e7411f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_dfebbd16-85e9-42a8-b0ee-622202e7411f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_fcc87a6a-d98d-4c6e-8fe7-a21c60aa31ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_fcc87a6a-d98d-4c6e-8fe7-a21c60aa31ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_770884ad-9a9d-4de2-acad-6f71529bab75" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_770884ad-9a9d-4de2-acad-6f71529bab75" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_dfb0578b-3648-4769-8f99-8404105c717a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_dfb0578b-3648-4769-8f99-8404105c717a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_3359d15b-95d8-4f03-9126-da909b1c10b7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_InterestAndDebtExpense_3359d15b-95d8-4f03-9126-da909b1c10b7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine_4667b1c3-b263-40df-bca3-c0f75e57c377" xlink:href="tg-20210630.xsd#tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_tg_AssetImpairmentAndCostsAssociatedWithExitAndDisposalActivitiesimpairmentLine_4667b1c3-b263-40df-bca3-c0f75e57c377" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_cb2be1a9-30c5-4084-9a60-b6b7a0ee1870" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_cb2be1a9-30c5-4084-9a60-b6b7a0ee1870" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_01a72cfb-22bd-44af-a0e4-93dd55793e62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_1e41c7f9-ebf2-45ad-8863-aad3af6cfbc8" xlink:to="loc_us-gaap_CostsAndExpenses_01a72cfb-22bd-44af-a0e4-93dd55793e62" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e099aa4a-d6c7-4c8f-9c2f-9ab815edba61" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e099aa4a-d6c7-4c8f-9c2f-9ab815edba61" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_6b997ce1-4e08-4de7-8d3e-f14a4dfb5684" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_6b997ce1-4e08-4de7-8d3e-f14a4dfb5684" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_736ad697-0704-4fc0-96cf-204554b40858" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_736ad697-0704-4fc0-96cf-204554b40858" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_e3e61fed-a41a-4a7b-aabe-807f1350b2ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_e3e61fed-a41a-4a7b-aabe-807f1350b2ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_a22e608e-04f5-4835-9bce-f8d07ce9d0dd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_a22e608e-04f5-4835-9bce-f8d07ce9d0dd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_48e14ed3-2246-4603-ac4c-0f394e17cabb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_NetIncomeLoss_48e14ed3-2246-4603-ac4c-0f394e17cabb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_54523f2c-36ff-4047-961d-dd9d756a8fbf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_EarningsPerShareAbstract_54523f2c-36ff-4047-961d-dd9d756a8fbf" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_e21cd99a-1bfd-42da-b9f7-5408ee420abd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_54523f2c-36ff-4047-961d-dd9d756a8fbf" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_e21cd99a-1bfd-42da-b9f7-5408ee420abd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_ae55f317-0519-4ce1-8f10-fd9d48d83ae0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_54523f2c-36ff-4047-961d-dd9d756a8fbf" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_ae55f317-0519-4ce1-8f10-fd9d48d83ae0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_982ebc16-1a2c-47eb-a0a2-de0cc3202a42" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_54523f2c-36ff-4047-961d-dd9d756a8fbf" xlink:to="loc_us-gaap_EarningsPerShareBasic_982ebc16-1a2c-47eb-a0a2-de0cc3202a42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDilutedAbstract_20028f6a-8b87-4de5-a1b5-18a5368d3bb2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_54523f2c-36ff-4047-961d-dd9d756a8fbf" xlink:to="loc_us-gaap_EarningsPerShareDilutedAbstract_20028f6a-8b87-4de5-a1b5-18a5368d3bb2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_a0ab714f-9e09-4343-8718-33ded4b2af7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_20028f6a-8b87-4de5-a1b5-18a5368d3bb2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_a0ab714f-9e09-4343-8718-33ded4b2af7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_2cbbecd0-d8d4-4169-b4a3-a7976b4e912a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_20028f6a-8b87-4de5-a1b5-18a5368d3bb2" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_2cbbecd0-d8d4-4169-b4a3-a7976b4e912a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_f2a9c3cc-8e23-415f-bc25-e73c58038e73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_20028f6a-8b87-4de5-a1b5-18a5368d3bb2" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_f2a9c3cc-8e23-415f-bc25-e73c58038e73" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_48064051-1a74-480e-94c7-f0d48bc02207" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_20028f6a-8b87-4de5-a1b5-18a5368d3bb2" xlink:to="loc_us-gaap_EarningsPerShareDiluted_48064051-1a74-480e-94c7-f0d48bc02207" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_SharesUsedToComputeEarningsLossPerShareAbstract_402ceb39-3548-46d4-a592-217fe8f400ed" xlink:href="tg-20210630.xsd#tg_SharesUsedToComputeEarningsLossPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_tg_SharesUsedToComputeEarningsLossPerShareAbstract_402ceb39-3548-46d4-a592-217fe8f400ed" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_15f75f8a-42d1-4b03-9093-37acdb2535ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_SharesUsedToComputeEarningsLossPerShareAbstract_402ceb39-3548-46d4-a592-217fe8f400ed" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_15f75f8a-42d1-4b03-9093-37acdb2535ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0dedd185-6d63-49cd-854c-e976b3207f54" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_SharesUsedToComputeEarningsLossPerShareAbstract_402ceb39-3548-46d4-a592-217fe8f400ed" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0dedd185-6d63-49cd-854c-e976b3207f54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid_7f57f80e-769d-45ec-97c8-59caf957bb8a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_SharesUsedToComputeEarningsLossPerShareAbstract_402ceb39-3548-46d4-a592-217fe8f400ed" xlink:to="loc_us-gaap_CommonStockDividendsPerShareCashPaid_7f57f80e-769d-45ec-97c8-59caf957bb8a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_f0018c98-1a0e-4bc9-b9da-7d494e42245b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_a12a2144-3020-46fc-8164-9a09d3c513ea" xlink:to="loc_us-gaap_StatementTable_f0018c98-1a0e-4bc9-b9da-7d494e42245b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_5e5c92de-8d91-45d0-96c6-ee13ee370f59" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_f0018c98-1a0e-4bc9-b9da-7d494e42245b" xlink:to="loc_srt_RestatementAxis_5e5c92de-8d91-45d0-96c6-ee13ee370f59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_5e5c92de-8d91-45d0-96c6-ee13ee370f59_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_5e5c92de-8d91-45d0-96c6-ee13ee370f59" xlink:to="loc_srt_RestatementDomain_5e5c92de-8d91-45d0-96c6-ee13ee370f59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_514b99af-c508-4331-b7ec-daa3cc2576b3" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_5e5c92de-8d91-45d0-96c6-ee13ee370f59" xlink:to="loc_srt_RestatementDomain_514b99af-c508-4331-b7ec-daa3cc2576b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_5b0a7063-c775-4059-96a3-860cbcd18524" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_f0018c98-1a0e-4bc9-b9da-7d494e42245b" xlink:to="loc_srt_ProductOrServiceAxis_5b0a7063-c775-4059-96a3-860cbcd18524" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5b0a7063-c775-4059-96a3-860cbcd18524_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_5b0a7063-c775-4059-96a3-860cbcd18524" xlink:to="loc_srt_ProductsAndServicesDomain_5b0a7063-c775-4059-96a3-860cbcd18524_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8c7cf0c4-43d9-466d-9302-242455597fe8" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_5b0a7063-c775-4059-96a3-860cbcd18524" xlink:to="loc_srt_ProductsAndServicesDomain_8c7cf0c4-43d9-466d-9302-242455597fe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_3991bd52-2847-4d58-b5f2-baf011b82be0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8c7cf0c4-43d9-466d-9302-242455597fe8" xlink:to="loc_us-gaap_ProductMember_3991bd52-2847-4d58-b5f2-baf011b82be0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShippingAndHandlingMember_072e62db-69a8-495e-bb59-6d56d699eb1e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShippingAndHandlingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8c7cf0c4-43d9-466d-9302-242455597fe8" xlink:to="loc_us-gaap_ShippingAndHandlingMember_072e62db-69a8-495e-bb59-6d56d699eb1e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedStatementsOfComprehensiveIncomeLoss"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="extended" id="iad255ae504cc4815b0dbf9a76f8ef531_ConsolidatedStatementsOfComprehensiveIncomeLoss">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_30fd8a51-ab8d-4a36-a626-0379bce75b76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_30fd8a51-ab8d-4a36-a626-0379bce75b76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_11efb2fd-bafb-4222-a5c7-61b44fa894a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeOtherNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_11efb2fd-bafb-4222-a5c7-61b44fa894a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_332fe8d0-2dc0-40f0-8175-464388e90abd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_NetIncomeLoss_332fe8d0-2dc0-40f0-8175-464388e90abd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_b9d5b460-3286-4cc8-bafd-9d91824cb41f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_b9d5b460-3286-4cc8-bafd-9d91824cb41f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_77275499-97bf-4181-beb4-419fb3605cd3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_77275499-97bf-4181-beb4-419fb3605cd3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_0ee59649-ff86-428e-a44c-e72d3e67ecdb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_0ee59649-ff86-428e-a44c-e72d3e67ecdb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_e734c32e-0861-4b18-8f67-6059653715be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_e734c32e-0861-4b18-8f67-6059653715be" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax_8cd347b1-d3e8-4d0d-8960-201750db6da4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax_8cd347b1-d3e8-4d0d-8960-201750db6da4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_a99c96c1-e997-4c29-a9f0-0f067701e475" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_a99c96c1-e997-4c29-a9f0-0f067701e475" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_e2ecc29d-abf3-4cd8-9626-c9f167f826df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_35cbe1b9-72a9-40e1-9fc8-f0ff9883b456" xlink:to="loc_us-gaap_StatementTable_e2ecc29d-abf3-4cd8-9626-c9f167f826df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:type="extended" id="i481890be961e496e9d30cea70a3928f3_ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_70bc9d85-da07-4257-8260-ee071900d5d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax_fd2a8cf9-0922-4841-93ec-5a105b2fa54c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_70bc9d85-da07-4257-8260-ee071900d5d7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax_fd2a8cf9-0922-4841-93ec-5a105b2fa54c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_9d2c2cdd-5830-4aa7-a208-2c538719ec4e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_70bc9d85-da07-4257-8260-ee071900d5d7" xlink:to="loc_us-gaap_StatementTable_9d2c2cdd-5830-4aa7-a208-2c538719ec4e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedStatementsOfCashFlows"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended" id="iaa6070cb20154e55978cd9c36160c0ac_ConsolidatedStatementsOfCashFlows">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_400d94fe-f15c-4600-810c-bb3565a5c159" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_400d94fe-f15c-4600-810c-bb3565a5c159" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_bc9fe8dc-f4e9-4ecf-9216-9ef4daae5a5a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_bc9fe8dc-f4e9-4ecf-9216-9ef4daae5a5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_5e9dacc4-c324-433d-831e-bdccf4834869" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_5e9dacc4-c324-433d-831e-bdccf4834869" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_d2bfb9e2-6704-4846-99a0-cdc5e6ec654b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_d2bfb9e2-6704-4846-99a0-cdc5e6ec654b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_5c80dcaf-7ae0-4ac5-a0b9-a02bf41bf84a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable_5c80dcaf-7ae0-4ac5-a0b9-a02bf41bf84a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f476e70b-6cdb-4275-9522-d53ad5dbeafb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f476e70b-6cdb-4275-9522-d53ad5dbeafb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_014a43b7-7531-473a-a8e5-c85502a725de" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_014a43b7-7531-473a-a8e5-c85502a725de" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeasePayments_52319665-27d2-4710-b2c6-574a3b0cb1e5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_ShortTermLeasePayments_52319665-27d2-4710-b2c6-574a3b0cb1e5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitContributions_f87c113b-bda7-4da2-b935-ee5454fc1f4b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitContributions_f87c113b-bda7-4da2-b935-ee5454fc1f4b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_27700c24-f6e7-4c76-a4bb-5890bc538403" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_27700c24-f6e7-4c76-a4bb-5890bc538403" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_6d81b2ad-ccdf-4cbc-a1f4-d96237598080" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_8328ab6a-dee8-4f55-aa9e-3991f10cf232" xlink:to="loc_us-gaap_StatementTable_6d81b2ad-ccdf-4cbc-a1f4-d96237598080" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" xlink:type="simple" xlink:href="tg-20210630.xsd#ConsolidatedStatementsOfShareholdersEquity"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ConsolidatedStatementsOfShareholdersEquity" xlink:type="extended" id="i18f16f329bfb439094614b7f8b3ab97c_ConsolidatedStatementsOfShareholdersEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_0cd31d35-aefe-4a81-9086-09669e0b1956" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_StockholdersEquity_0cd31d35-aefe-4a81-9086-09669e0b1956" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_b633e69d-1b1e-4851-999d-f1485b615402" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_NetIncomeLoss_b633e69d-1b1e-4851-999d-f1485b615402" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_dc7b2085-6d59-4c89-b72d-970ed952df1b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_dc7b2085-6d59-4c89-b72d-970ed952df1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_9a042ab3-1687-494e-a6e4-a8f12affe3dc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_9a042ab3-1687-494e-a6e4-a8f12affe3dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_b1a47f0f-f428-49ab-b00e-21c533a36f7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_b1a47f0f-f428-49ab-b00e-21c533a36f7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_62219b50-2a09-4508-800f-09c4bcb0bb92" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_DividendsCommonStockCash_62219b50-2a09-4508-800f-09c4bcb0bb92" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ShareBasedCompensationExpenseValue_bd325a4c-c595-4c3d-b3c1-aee89d48a9f3" xlink:href="tg-20210630.xsd#tg_ShareBasedCompensationExpenseValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_tg_ShareBasedCompensationExpenseValue_bd325a4c-c595-4c3d-b3c1-aee89d48a9f3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4276bb94-3569-466f-84a8-342ac2900784" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4276bb94-3569-466f-84a8-342ac2900784" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_a7b05c47-6437-41ed-9207-af038d500b48" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_a7b05c47-6437-41ed-9207-af038d500b48" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan_2bdb28ec-638e-4994-b9ab-856dc9e87dd5" xlink:href="tg-20210630.xsd#tg_TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_tg_TredegarCommonStockPurchasedByTrustForSavingsRestorationPlan_2bdb28ec-638e-4994-b9ab-856dc9e87dd5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_c84c05e5-4cfa-4f6d-ac7b-4e5548022900" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_69ddfa9e-488e-43d9-bf8f-3e13556712a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_69ddfa9e-488e-43d9-bf8f-3e13556712a1" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax_626eee80-9d4f-430a-ac2b-7e6e48cf9d6a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax_626eee80-9d4f-430a-ac2b-7e6e48cf9d6a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_200da5b2-c4d4-41ab-b292-958e136fdb41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_200da5b2-c4d4-41ab-b292-958e136fdb41" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_4acd7ef4-c9c9-451d-8c5e-c4b4ee4768bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_4acd7ef4-c9c9-451d-8c5e-c4b4ee4768bb" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_77d46469-de76-458c-9655-a4538bf34c96" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1f30b6a7-0bd2-48fc-a282-dc4afba96969" xlink:to="loc_us-gaap_StatementTable_77d46469-de76-458c-9655-a4538bf34c96" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_bb96a4b0-8f8b-466f-ad10-de1cec876e51" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_77d46469-de76-458c-9655-a4538bf34c96" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_bb96a4b0-8f8b-466f-ad10-de1cec876e51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_bb96a4b0-8f8b-466f-ad10-de1cec876e51_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bb96a4b0-8f8b-466f-ad10-de1cec876e51" xlink:to="loc_us-gaap_EquityComponentDomain_bb96a4b0-8f8b-466f-ad10-de1cec876e51_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bb96a4b0-8f8b-466f-ad10-de1cec876e51" xlink:to="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_297eff3c-40eb-4a38-ad04-536b8307f0d4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:to="loc_us-gaap_CommonStockMember_297eff3c-40eb-4a38-ad04-536b8307f0d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_2f5c86c6-6a8e-463a-a2b3-ed0af7ac12cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:to="loc_us-gaap_RetainedEarningsMember_2f5c86c6-6a8e-463a-a2b3-ed0af7ac12cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TrustForSavingRestorationPlanMember_1eb018c7-e9a7-4471-9cf4-72f315eb2df0" xlink:href="tg-20210630.xsd#tg_TrustForSavingRestorationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:to="loc_tg_TrustForSavingRestorationPlanMember_1eb018c7-e9a7-4471-9cf4-72f315eb2df0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_183784df-38ef-4954-bea7-362f5eef12b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_183784df-38ef-4954-bea7-362f5eef12b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_5dfe7aa1-5cc6-41f0-8821-f0891afd2da0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_5dfe7aa1-5cc6-41f0-8821-f0891afd2da0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_fa330fe9-028b-4247-85be-8d925e849518" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_263efc28-f3cc-49fc-be14-781d14719eba" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_fa330fe9-028b-4247-85be-8d925e849518" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#BasisOfPresentationTradenameacceleratedamortizationDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/BasisOfPresentationTradenameacceleratedamortizationDetails" xlink:type="extended" id="if285e8dd10f94f13a5826629223ea505_BasisOfPresentationTradenameacceleratedamortizationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_tg_ScheduleofTradeNameAcceleratedAmortizationLineItems_c7035e90-59ba-4b1e-96be-3a295ab4a0d9" xlink:href="tg-20210630.xsd#tg_ScheduleofTradeNameAcceleratedAmortizationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedTradeNamesGross_16a637c3-de95-4fdd-b70f-d16672afa352" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedTradeNamesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationLineItems_c7035e90-59ba-4b1e-96be-3a295ab4a0d9" xlink:to="loc_us-gaap_FiniteLivedTradeNamesGross_16a637c3-de95-4fdd-b70f-d16672afa352" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_a17160e1-075e-495f-946b-1ea7cd4094bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationLineItems_c7035e90-59ba-4b1e-96be-3a295ab4a0d9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_a17160e1-075e-495f-946b-1ea7cd4094bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TradeNameAcceleratedAmortization_d71fac88-c427-46ef-b985-1ed8549cd4a7" xlink:href="tg-20210630.xsd#tg_TradeNameAcceleratedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationLineItems_c7035e90-59ba-4b1e-96be-3a295ab4a0d9" xlink:to="loc_tg_TradeNameAcceleratedAmortization_d71fac88-c427-46ef-b985-1ed8549cd4a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_f40e5dc0-7097-4329-a3d2-ed25aa444a9f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationLineItems_c7035e90-59ba-4b1e-96be-3a295ab4a0d9" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_f40e5dc0-7097-4329-a3d2-ed25aa444a9f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ScheduleofTradeNameAcceleratedAmortizationTable_6b5cd73a-a2d2-4565-867d-6773faf992ee" xlink:href="tg-20210630.xsd#tg_ScheduleofTradeNameAcceleratedAmortizationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationLineItems_c7035e90-59ba-4b1e-96be-3a295ab4a0d9" xlink:to="loc_tg_ScheduleofTradeNameAcceleratedAmortizationTable_6b5cd73a-a2d2-4565-867d-6773faf992ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsAxis_2a22b369-4b8e-4677-970f-9c4b4f7d3432" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationTable_6b5cd73a-a2d2-4565-867d-6773faf992ee" xlink:to="loc_us-gaap_SubsegmentsAxis_2a22b369-4b8e-4677-970f-9c4b4f7d3432" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_2a22b369-4b8e-4677-970f-9c4b4f7d3432_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_2a22b369-4b8e-4677-970f-9c4b4f7d3432" xlink:to="loc_us-gaap_SubsegmentsDomain_2a22b369-4b8e-4677-970f-9c4b4f7d3432_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_8c0d16ca-b54e-4fdf-8e7c-839de3369b1c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_2a22b369-4b8e-4677-970f-9c4b4f7d3432" xlink:to="loc_us-gaap_SubsegmentsDomain_8c0d16ca-b54e-4fdf-8e7c-839de3369b1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AacoaMember_691d9723-d0da-48ab-bba2-b50808d24c11" xlink:href="tg-20210630.xsd#tg_AacoaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_8c0d16ca-b54e-4fdf-8e7c-839de3369b1c" xlink:to="loc_tg_AacoaMember_691d9723-d0da-48ab-bba2-b50808d24c11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FuturaMember_a834bd64-5328-4089-a59d-9939bfaf0a10" xlink:href="tg-20210630.xsd#tg_FuturaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_8c0d16ca-b54e-4fdf-8e7c-839de3369b1c" xlink:to="loc_tg_FuturaMember_a834bd64-5328-4089-a59d-9939bfaf0a10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_caa01031-c375-4f9f-8b46-773eba89de55" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_ScheduleofTradeNameAcceleratedAmortizationTable_6b5cd73a-a2d2-4565-867d-6773faf992ee" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_caa01031-c375-4f9f-8b46-773eba89de55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_caa01031-c375-4f9f-8b46-773eba89de55_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_caa01031-c375-4f9f-8b46-773eba89de55" xlink:to="loc_us-gaap_SegmentDomain_caa01031-c375-4f9f-8b46-773eba89de55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_138d357b-3b2e-4725-b8b2-a54d82b707d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_caa01031-c375-4f9f-8b46-773eba89de55" xlink:to="loc_us-gaap_SegmentDomain_138d357b-3b2e-4725-b8b2-a54d82b707d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsMember_c023327a-fa6c-4f7b-b8af-3a23fc22f9a1" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_138d357b-3b2e-4725-b8b2-a54d82b707d2" xlink:to="loc_tg_AluminumExtrusionsMember_c023327a-fa6c-4f7b-b8af-3a23fc22f9a1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#BasisOfPresentationAccountsandOtherReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/BasisOfPresentationAccountsandOtherReceivablesDetails" xlink:type="extended" id="ie4f95252c6f141d2915e09c003906dd2_BasisOfPresentationAccountsandOtherReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_9d931a24-ea85-4fa2-9034-d4a540f462ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_AccountsReceivableNet_9d931a24-ea85-4fa2-9034-d4a540f462ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_13fc730c-ca10-4f22-b339-275635feb224" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_13fc730c-ca10-4f22-b339-275635feb224" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivables_ad8895e0-09d4-4189-83b3-c1ffc2a936a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_OtherReceivables_ad8895e0-09d4-4189-83b3-c1ffc2a936a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables_6407bdd2-7e4f-4578-8965-84b0bc24b6bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables_6407bdd2-7e4f-4578-8965-84b0bc24b6bc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableChangeInMethodCreditLossExpenseReversal_cefa9799-6cce-443f-b594-129efde6963a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableChangeInMethodCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_AccountsReceivableChangeInMethodCreditLossExpenseReversal_cefa9799-6cce-443f-b594-129efde6963a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_53121566-40a2-4ef3-930f-996eff50fa4c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_ReceivablesNetCurrent_53121566-40a2-4ef3-930f-996eff50fa4c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_2d8ad77a-4db8-4266-aef1-df2b71f1fdfb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_a44ed966-74a9-41dd-87e7-7b050680bb91" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39f1bc54-f93e-4ee6-9172-35076c2d8fdc" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_a44ed966-74a9-41dd-87e7-7b050680bb91" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_ab4742f2-8e7d-430a-ad40-7fbc3058b865" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_a44ed966-74a9-41dd-87e7-7b050680bb91" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_ab4742f2-8e7d-430a-ad40-7fbc3058b865" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_ab4742f2-8e7d-430a-ad40-7fbc3058b865_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_ab4742f2-8e7d-430a-ad40-7fbc3058b865" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_ab4742f2-8e7d-430a-ad40-7fbc3058b865_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_964564df-f4e4-499a-93a5-31066175f7d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_ab4742f2-8e7d-430a-ad40-7fbc3058b865" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_964564df-f4e4-499a-93a5-31066175f7d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_OtherAccruedExpensesMember_ada26d5d-fc53-48ef-828e-90c12859154f" xlink:href="tg-20210630.xsd#tg_OtherAccruedExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_964564df-f4e4-499a-93a5-31066175f7d6" xlink:to="loc_tg_OtherAccruedExpensesMember_ada26d5d-fc53-48ef-828e-90c12859154f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ImpairmentDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#ImpairmentDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ImpairmentDetails" xlink:type="extended" id="i68d7f930ebf84696b5b370f8afd8af79_ImpairmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems_847d238a-9ad0-4432-874c-663cfbfb0578" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_043382b6-689f-4194-a873-e5dafd4a7e5a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems_847d238a-9ad0-4432-874c-663cfbfb0578" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_043382b6-689f-4194-a873-e5dafd4a7e5a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLossNetOfTax_04bbb84d-4c4a-4285-87d9-d29555d00da9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems_847d238a-9ad0-4432-874c-663cfbfb0578" xlink:to="loc_us-gaap_GoodwillImpairmentLossNetOfTax_04bbb84d-4c4a-4285-87d9-d29555d00da9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AcceleratedDepreciationExpense_b1bc4cf1-a0c1-48a5-b690-9063f627bba3" xlink:href="tg-20210630.xsd#tg_AcceleratedDepreciationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems_847d238a-9ad0-4432-874c-663cfbfb0578" xlink:to="loc_tg_AcceleratedDepreciationExpense_b1bc4cf1-a0c1-48a5-b690-9063f627bba3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_LossofFutureSalesProjection_1f6be587-4746-432e-8c38-d7cc4ce2dbfb" xlink:href="tg-20210630.xsd#tg_LossofFutureSalesProjection"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems_847d238a-9ad0-4432-874c-663cfbfb0578" xlink:to="loc_tg_LossofFutureSalesProjection_1f6be587-4746-432e-8c38-d7cc4ce2dbfb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable_b4b814a9-f641-4995-b809-28151ac3baff" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ImpairedLongLivedAssetsHeldAndUsedLineItems_847d238a-9ad0-4432-874c-663cfbfb0578" xlink:to="loc_us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable_b4b814a9-f641-4995-b809-28151ac3baff" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityByLocationAxis_ed1f052f-c330-41d7-a9b0-825938e8b97e" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityByLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable_b4b814a9-f641-4995-b809-28151ac3baff" xlink:to="loc_dei_EntityByLocationAxis_ed1f052f-c330-41d7-a9b0-825938e8b97e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocationDomain_ed1f052f-c330-41d7-a9b0-825938e8b97e_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityByLocationAxis_ed1f052f-c330-41d7-a9b0-825938e8b97e" xlink:to="loc_dei_LocationDomain_ed1f052f-c330-41d7-a9b0-825938e8b97e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocationDomain_f3e50498-5482-4a5d-9e58-465bd91ff290" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityByLocationAxis_ed1f052f-c330-41d7-a9b0-825938e8b97e" xlink:to="loc_dei_LocationDomain_f3e50498-5482-4a5d-9e58-465bd91ff290" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PersonalCareMaterialsMember_d645eb55-74ae-4801-b27e-1404795b5990" xlink:href="tg-20210630.xsd#tg_PersonalCareMaterialsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_LocationDomain_f3e50498-5482-4a5d-9e58-465bd91ff290" xlink:to="loc_tg_PersonalCareMaterialsMember_d645eb55-74ae-4801-b27e-1404795b5990" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AacoaMember_354fd9f0-b658-41e9-a1ff-73a90fd86936" xlink:href="tg-20210630.xsd#tg_AacoaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_LocationDomain_f3e50498-5482-4a5d-9e58-465bd91ff290" xlink:to="loc_tg_AacoaMember_354fd9f0-b658-41e9-a1ff-73a90fd86936" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_d2e9f4d3-206f-44cd-ba2e-addf965141f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable_b4b814a9-f641-4995-b809-28151ac3baff" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_d2e9f4d3-206f-44cd-ba2e-addf965141f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d2e9f4d3-206f-44cd-ba2e-addf965141f6_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d2e9f4d3-206f-44cd-ba2e-addf965141f6" xlink:to="loc_us-gaap_SegmentDomain_d2e9f4d3-206f-44cd-ba2e-addf965141f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e2f22cd9-671d-4a1b-96d0-8e602ebf5930" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d2e9f4d3-206f-44cd-ba2e-addf965141f6" xlink:to="loc_us-gaap_SegmentDomain_e2f22cd9-671d-4a1b-96d0-8e602ebf5930" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PEFilmsMember_a64015af-5cda-45bc-b11b-2350f5096d5a" xlink:href="tg-20210630.xsd#tg_PEFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e2f22cd9-671d-4a1b-96d0-8e602ebf5930" xlink:to="loc_tg_PEFilmsMember_a64015af-5cda-45bc-b11b-2350f5096d5a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsMember_371927a7-4914-467d-8d6a-8e193d58a8a5" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e2f22cd9-671d-4a1b-96d0-8e602ebf5930" xlink:to="loc_tg_AluminumExtrusionsMember_371927a7-4914-467d-8d6a-8e193d58a8a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_fead4fb1-3b43-450d-a9ea-605a6ca1b5c5" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable_b4b814a9-f641-4995-b809-28151ac3baff" xlink:to="loc_srt_StatementScenarioAxis_fead4fb1-3b43-450d-a9ea-605a6ca1b5c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_fead4fb1-3b43-450d-a9ea-605a6ca1b5c5_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_fead4fb1-3b43-450d-a9ea-605a6ca1b5c5" xlink:to="loc_srt_ScenarioUnspecifiedDomain_fead4fb1-3b43-450d-a9ea-605a6ca1b5c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_21ab13b6-fb08-434f-ace3-f7bb660a7ca5" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_fead4fb1-3b43-450d-a9ea-605a6ca1b5c5" xlink:to="loc_srt_ScenarioUnspecifiedDomain_21ab13b6-fb08-434f-ace3-f7bb660a7ca5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EBITDAProjectionAxis_66696a77-1028-4193-b289-6a18e94e7a8d" xlink:href="tg-20210630.xsd#tg_EBITDAProjectionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedLongLivedAssetsHeldAndUsedTable_b4b814a9-f641-4995-b809-28151ac3baff" xlink:to="loc_tg_EBITDAProjectionAxis_66696a77-1028-4193-b289-6a18e94e7a8d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EBITDAProjectionDomain_66696a77-1028-4193-b289-6a18e94e7a8d_default" xlink:href="tg-20210630.xsd#tg_EBITDAProjectionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tg_EBITDAProjectionAxis_66696a77-1028-4193-b289-6a18e94e7a8d" xlink:to="loc_tg_EBITDAProjectionDomain_66696a77-1028-4193-b289-6a18e94e7a8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EBITDAProjectionDomain_6003a237-890a-4d00-9d2b-a3a1ae9360de" xlink:href="tg-20210630.xsd#tg_EBITDAProjectionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tg_EBITDAProjectionAxis_66696a77-1028-4193-b289-6a18e94e7a8d" xlink:to="loc_tg_EBITDAProjectionDomain_6003a237-890a-4d00-9d2b-a3a1ae9360de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_OriginalBudgetMember_f4f8b28a-ae9c-4ec4-bb6e-20fe706a6542" xlink:href="tg-20210630.xsd#tg_OriginalBudgetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_EBITDAProjectionDomain_6003a237-890a-4d00-9d2b-a3a1ae9360de" xlink:to="loc_tg_OriginalBudgetMember_f4f8b28a-ae9c-4ec4-bb6e-20fe706a6542" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_RevisedCOVID19BudgetMember_f8ab72c9-a92d-41da-a2df-a25eccb60940" xlink:href="tg-20210630.xsd#tg_RevisedCOVID19BudgetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_EBITDAProjectionDomain_6003a237-890a-4d00-9d2b-a3a1ae9360de" xlink:to="loc_tg_RevisedCOVID19BudgetMember_f8ab72c9-a92d-41da-a2df-a25eccb60940" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" xlink:href="tg-20210630.xsd#AccumulatedOtherComprehensiveIncomeLoss"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended" id="i0433426a0db94087a750514d89a0855b_AccumulatedOtherComprehensiveIncomeLoss">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_11686b34-2855-41ff-bf89-3a6e350281b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_b7e106ea-908c-49c6-a47b-e76146dd15b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNoteTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_11686b34-2855-41ff-bf89-3a6e350281b8" xlink:to="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_b7e106ea-908c-49c6-a47b-e76146dd15b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_cd463351-4a55-498e-89d4-ac6c1c9e06b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_11686b34-2855-41ff-bf89-3a6e350281b8" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_cd463351-4a55-498e-89d4-ac6c1c9e06b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8f614522-56de-4cb2-a768-87886bfea2ed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_11686b34-2855-41ff-bf89-3a6e350281b8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8f614522-56de-4cb2-a768-87886bfea2ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_6032b760-2583-4cd0-a4fe-053dd86ac6de" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8f614522-56de-4cb2-a768-87886bfea2ed" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_6032b760-2583-4cd0-a4fe-053dd86ac6de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_6032b760-2583-4cd0-a4fe-053dd86ac6de_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_6032b760-2583-4cd0-a4fe-053dd86ac6de" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_6032b760-2583-4cd0-a4fe-053dd86ac6de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_bf4e2f21-a18f-4e02-b829-7ac2b6a56fc0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_6032b760-2583-4cd0-a4fe-053dd86ac6de" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_bf4e2f21-a18f-4e02-b829-7ac2b6a56fc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_e4fed3a0-9e6e-4455-ad6a-7572c377ee2c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_bf4e2f21-a18f-4e02-b829-7ac2b6a56fc0" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_e4fed3a0-9e6e-4455-ad6a-7572c377ee2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_61e953ad-0816-49b4-a116-f83966f0fc39" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8f614522-56de-4cb2-a768-87886bfea2ed" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_61e953ad-0816-49b4-a116-f83966f0fc39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_61e953ad-0816-49b4-a116-f83966f0fc39_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_61e953ad-0816-49b4-a116-f83966f0fc39" xlink:to="loc_us-gaap_EquityComponentDomain_61e953ad-0816-49b4-a116-f83966f0fc39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_10226107-78f0-49bd-945d-de332250607e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_61e953ad-0816-49b4-a116-f83966f0fc39" xlink:to="loc_us-gaap_EquityComponentDomain_10226107-78f0-49bd-945d-de332250607e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_1f5a30c1-3793-473e-ac7b-0e36aeb5416d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_10226107-78f0-49bd-945d-de332250607e" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_1f5a30c1-3793-473e-ac7b-0e36aeb5416d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_dcff7040-b0ee-42a7-9e79-7ee8fb618a4d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8f614522-56de-4cb2-a768-87886bfea2ed" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_dcff7040-b0ee-42a7-9e79-7ee8fb618a4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_dcff7040-b0ee-42a7-9e79-7ee8fb618a4d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_dcff7040-b0ee-42a7-9e79-7ee8fb618a4d" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_dcff7040-b0ee-42a7-9e79-7ee8fb618a4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_54080acb-8e06-422e-a89f-3c5d5849c830" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_dcff7040-b0ee-42a7-9e79-7ee8fb618a4d" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_54080acb-8e06-422e-a89f-3c5d5849c830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_ef67fb86-ba55-48fe-8ebf-fdbe8fdb7b23" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_54080acb-8e06-422e-a89f-3c5d5849c830" xlink:to="loc_tg_AluminumFuturesContractsMember_ef67fb86-ba55-48fe-8ebf-fdbe8fdb7b23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_2964327b-de9e-4c0d-9ae8-63af4fec4910" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_54080acb-8e06-422e-a89f-3c5d5849c830" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_2964327b-de9e-4c0d-9ae8-63af4fec4910" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" id="i9d4d1c9496bc493c8ddc3b848c523e9f_AccumulatedOtherComprehensiveIncomeLossScheduleOfAfterTaxChangesInAccumulatedOtherComprehensiveIncomeLossDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_8077c996-b522-4f30-837a-b6df932875a0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_8077c996-b522-4f30-837a-b6df932875a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_4dcce391-92fd-4044-9048-a2922afd7860" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_4dcce391-92fd-4044-9048-a2922afd7860" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e1140635-dc0d-40b7-8863-759ba4b2cfb0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e1140635-dc0d-40b7-8863-759ba4b2cfb0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_69119437-4748-4b9c-b42d-609b05a46dd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_69119437-4748-4b9c-b42d-609b05a46dd4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_381feae1-5891-4117-adcf-398bc498c1ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_381feae1-5891-4117-adcf-398bc498c1ca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_4102840e-5a24-49b0-bb8f-680a8aa486bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_4102840e-5a24-49b0-bb8f-680a8aa486bd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_8f12ee02-4154-48f8-8eee-653be179e90a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a6859f56-2c1f-49d9-9d55-909bc5fb247a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a6859f56-2c1f-49d9-9d55-909bc5fb247a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_b355b41a-cba6-4487-8daa-aaa1e017cfec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_b355b41a-cba6-4487-8daa-aaa1e017cfec" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_506978ab-7d40-4c64-bfe4-11069a1da1ed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_NetIncomeLoss_506978ab-7d40-4c64-bfe4-11069a1da1ed" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AmortizationOfPriorServiceCostsAndNetGainsLoss_5472369c-481a-41bc-b605-e7db8339d1f1" xlink:href="tg-20210630.xsd#tg_AmortizationOfPriorServiceCostsAndNetGainsLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_tg_AmortizationOfPriorServiceCostsAndNetGainsLoss_5472369c-481a-41bc-b605-e7db8339d1f1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d40cdd38-0702-4c11-8b0e-a21a82616ccd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_56d5ae22-4961-4bdc-a269-167e540e060b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d40cdd38-0702-4c11-8b0e-a21a82616ccd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_8a76b09b-eedc-4656-80ee-79e7d7dfae0a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d40cdd38-0702-4c11-8b0e-a21a82616ccd" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_8a76b09b-eedc-4656-80ee-79e7d7dfae0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_8a76b09b-eedc-4656-80ee-79e7d7dfae0a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_8a76b09b-eedc-4656-80ee-79e7d7dfae0a" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_8a76b09b-eedc-4656-80ee-79e7d7dfae0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_405f497a-6e15-4881-bb7f-57cc54fc2224" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_8a76b09b-eedc-4656-80ee-79e7d7dfae0a" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_405f497a-6e15-4881-bb7f-57cc54fc2224" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_acdb6700-e1bf-4ce5-b32c-3c91a19a37a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_405f497a-6e15-4881-bb7f-57cc54fc2224" xlink:to="loc_us-gaap_CostOfSalesMember_acdb6700-e1bf-4ce5-b32c-3c91a19a37a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_a376433e-5127-40e0-bd01-8cf7ccb81e76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d40cdd38-0702-4c11-8b0e-a21a82616ccd" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_a376433e-5127-40e0-bd01-8cf7ccb81e76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_a376433e-5127-40e0-bd01-8cf7ccb81e76_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a376433e-5127-40e0-bd01-8cf7ccb81e76" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_a376433e-5127-40e0-bd01-8cf7ccb81e76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_59ffb939-6742-4c63-a4be-557598685a58" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a376433e-5127-40e0-bd01-8cf7ccb81e76" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_59ffb939-6742-4c63-a4be-557598685a58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_cac09c8b-8fd0-4478-8434-1a6eb1f208ef" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_59ffb939-6742-4c63-a4be-557598685a58" xlink:to="loc_tg_AluminumFuturesContractsMember_cac09c8b-8fd0-4478-8434-1a6eb1f208ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwardContractsMember_62c94ce9-91de-48e1-9dc2-1df1411821d5" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_59ffb939-6742-4c63-a4be-557598685a58" xlink:to="loc_tg_ForeignCurrencyForwardContractsMember_62c94ce9-91de-48e1-9dc2-1df1411821d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_1ebe7b3e-def2-47cb-a156-03904bd3efb0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d40cdd38-0702-4c11-8b0e-a21a82616ccd" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_1ebe7b3e-def2-47cb-a156-03904bd3efb0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_1ebe7b3e-def2-47cb-a156-03904bd3efb0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_1ebe7b3e-def2-47cb-a156-03904bd3efb0" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_1ebe7b3e-def2-47cb-a156-03904bd3efb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_3aad93bf-1876-4b2b-8f00-c9f33e3da781" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_1ebe7b3e-def2-47cb-a156-03904bd3efb0" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_3aad93bf-1876-4b2b-8f00-c9f33e3da781" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_2cf1dd65-a565-4840-b2a8-1abb0e81436e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_3aad93bf-1876-4b2b-8f00-c9f33e3da781" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_2cf1dd65-a565-4840-b2a8-1abb0e81436e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_902ebd21-d58e-4ef4-afc3-9ee3fba77f16" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_d40cdd38-0702-4c11-8b0e-a21a82616ccd" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_902ebd21-d58e-4ef4-afc3-9ee3fba77f16" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_902ebd21-d58e-4ef4-afc3-9ee3fba77f16_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_902ebd21-d58e-4ef4-afc3-9ee3fba77f16" xlink:to="loc_us-gaap_EquityComponentDomain_902ebd21-d58e-4ef4-afc3-9ee3fba77f16_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_cdb1dd56-af4e-4779-a6b4-c16bab1db343" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_902ebd21-d58e-4ef4-afc3-9ee3fba77f16" xlink:to="loc_us-gaap_EquityComponentDomain_cdb1dd56-af4e-4779-a6b4-c16bab1db343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_fad050c7-b8e8-479d-b91a-25e0f763b8db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_cdb1dd56-af4e-4779-a6b4-c16bab1db343" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_fad050c7-b8e8-479d-b91a-25e0f763b8db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_c92b7997-4278-4bce-9e41-20bcbae6fd9c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_cdb1dd56-af4e-4779-a6b4-c16bab1db343" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_c92b7997-4278-4bce-9e41-20bcbae6fd9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_c1bc27ac-4e43-4c3c-a44d-b86a74f3adbd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_cdb1dd56-af4e-4779-a6b4-c16bab1db343" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_c1bc27ac-4e43-4c3c-a44d-b86a74f3adbd" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails" xlink:type="extended" id="i9188da82d2dd4d118bc28d91cfc12fa5_AccumulatedOtherComprehensiveIncomeLossScheduleOfReclassificationsOfBalancesOutOfAccumulatedOtherComprehensiveIncomeLossIntoNetIncomeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_d1d9491a-867b-43ce-957d-806b32d794c3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_d1d9491a-867b-43ce-957d-806b32d794c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_fe7e313a-30c5-4281-89e9-c95b9578c1fa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_fe7e313a-30c5-4281-89e9-c95b9578c1fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_1768fb7f-2cbb-4d59-88a2-8803e002fb05" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_1768fb7f-2cbb-4d59-88a2-8803e002fb05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c9c74461-8b65-4cc9-855c-80a3bd6a144e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c9c74461-8b65-4cc9-855c-80a3bd6a144e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AmortizationOfPriorServiceCostsAndNetGainsLoss_2dc4ee82-f114-48df-a6d1-aabbca2b02f6" xlink:href="tg-20210630.xsd#tg_AmortizationOfPriorServiceCostsAndNetGainsLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_tg_AmortizationOfPriorServiceCostsAndNetGainsLoss_2dc4ee82-f114-48df-a6d1-aabbca2b02f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_b2c581c5-80d8-47ed-87e3-753d2e120d78" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_b2c581c5-80d8-47ed-87e3-753d2e120d78" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c97080fc-327f-4bda-b8d4-ace4bdc7afcf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_NetIncomeLoss_c97080fc-327f-4bda-b8d4-ace4bdc7afcf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_ba152f65-2e38-4b2d-8c1b-9b558306a35e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_f980dd53-3195-4aab-ab1d-41e90170d1c5" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_ba152f65-2e38-4b2d-8c1b-9b558306a35e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_1d2e58b6-9f8c-42d6-b2ad-f0d3fa5b463d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_ba152f65-2e38-4b2d-8c1b-9b558306a35e" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_1d2e58b6-9f8c-42d6-b2ad-f0d3fa5b463d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_1d2e58b6-9f8c-42d6-b2ad-f0d3fa5b463d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1d2e58b6-9f8c-42d6-b2ad-f0d3fa5b463d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_1d2e58b6-9f8c-42d6-b2ad-f0d3fa5b463d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_898a6e8a-790b-437b-bd22-c5ab5119a22b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_1d2e58b6-9f8c-42d6-b2ad-f0d3fa5b463d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_898a6e8a-790b-437b-bd22-c5ab5119a22b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_d666e78d-b06e-4397-bd3f-3b1dcc5ae6aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_898a6e8a-790b-437b-bd22-c5ab5119a22b" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_d666e78d-b06e-4397-bd3f-3b1dcc5ae6aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_3a19a069-a1f1-4c11-bb4d-a224dfcee9af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_898a6e8a-790b-437b-bd22-c5ab5119a22b" xlink:to="loc_us-gaap_CostOfSalesMember_3a19a069-a1f1-4c11-bb4d-a224dfcee9af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_15462d4d-d047-474a-8a3a-852a30ab4eb4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_ba152f65-2e38-4b2d-8c1b-9b558306a35e" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_15462d4d-d047-474a-8a3a-852a30ab4eb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_15462d4d-d047-474a-8a3a-852a30ab4eb4_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_15462d4d-d047-474a-8a3a-852a30ab4eb4" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_15462d4d-d047-474a-8a3a-852a30ab4eb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_a16298f1-1441-4683-a8d1-6b2d25aa945b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_15462d4d-d047-474a-8a3a-852a30ab4eb4" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_a16298f1-1441-4683-a8d1-6b2d25aa945b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9854a669-e16d-419f-8cb7-7e3ed647d1a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_a16298f1-1441-4683-a8d1-6b2d25aa945b" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9854a669-e16d-419f-8cb7-7e3ed647d1a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_d5957d2f-3969-4bc7-b4fa-10bfe9c08465" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_ba152f65-2e38-4b2d-8c1b-9b558306a35e" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_d5957d2f-3969-4bc7-b4fa-10bfe9c08465" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_d5957d2f-3969-4bc7-b4fa-10bfe9c08465_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_d5957d2f-3969-4bc7-b4fa-10bfe9c08465" xlink:to="loc_us-gaap_EquityComponentDomain_d5957d2f-3969-4bc7-b4fa-10bfe9c08465_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_0c26ad4e-7ffa-4a23-a625-685e0098aa5e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_d5957d2f-3969-4bc7-b4fa-10bfe9c08465" xlink:to="loc_us-gaap_EquityComponentDomain_0c26ad4e-7ffa-4a23-a625-685e0098aa5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_3f827240-495a-4bc6-b9ec-5b0cfb30f2b1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_0c26ad4e-7ffa-4a23-a625-685e0098aa5e" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_3f827240-495a-4bc6-b9ec-5b0cfb30f2b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_ea3c87be-ecd8-4a44-b704-eb8e660351cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_0c26ad4e-7ffa-4a23-a625-685e0098aa5e" xlink:to="loc_us-gaap_AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember_ea3c87be-ecd8-4a44-b704-eb8e660351cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_bf34f98e-497a-4282-8095-7ad1d9cebd09" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_0c26ad4e-7ffa-4a23-a625-685e0098aa5e" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_bf34f98e-497a-4282-8095-7ad1d9cebd09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_01c8ef07-9e62-4a81-bfd1-b580cd8f3cbf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_ba152f65-2e38-4b2d-8c1b-9b558306a35e" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_01c8ef07-9e62-4a81-bfd1-b580cd8f3cbf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_01c8ef07-9e62-4a81-bfd1-b580cd8f3cbf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01c8ef07-9e62-4a81-bfd1-b580cd8f3cbf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_01c8ef07-9e62-4a81-bfd1-b580cd8f3cbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_386b4e2f-9fc4-4033-9212-b1db49d1d53d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_01c8ef07-9e62-4a81-bfd1-b580cd8f3cbf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_386b4e2f-9fc4-4033-9212-b1db49d1d53d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_7271ba7c-2bfb-4bd8-8fe7-6dde7e32dac4" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_386b4e2f-9fc4-4033-9212-b1db49d1d53d" xlink:to="loc_tg_AluminumFuturesContractsMember_7271ba7c-2bfb-4bd8-8fe7-6dde7e32dac4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwardContractsMember_91ec9ff4-263d-4b50-9367-5fd56e7994c2" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_386b4e2f-9fc4-4033-9212-b1db49d1d53d" xlink:to="loc_tg_ForeignCurrencyForwardContractsMember_91ec9ff4-263d-4b50-9367-5fd56e7994c2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/InvestmentsNarrativeDetails1" xlink:type="simple" xlink:href="tg-20210630.xsd#InvestmentsNarrativeDetails1"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/InvestmentsNarrativeDetails1" xlink:type="extended" id="i4c80c3ef86dc46c6b319190d89d3d894_InvestmentsNarrativeDetails1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_ebd541d8-b75f-4c48-8360-bfd201d6d3f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:to="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_ebd541d8-b75f-4c48-8360-bfd201d6d3f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_WeightingofEBITDAMultipleMethodversusDCFMethod_2e3f1e05-1e33-42de-9c43-1095fb272c69" xlink:href="tg-20210630.xsd#tg_WeightingofEBITDAMultipleMethodversusDCFMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:to="loc_tg_WeightingofEBITDAMultipleMethodversusDCFMethod_2e3f1e05-1e33-42de-9c43-1095fb272c69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_cda1c1bb-e09b-42df-9051-4981a7ff492e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_cda1c1bb-e09b-42df-9051-4981a7ff492e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_babf8362-93d9-4d49-ae46-eff7103a74f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_babf8362-93d9-4d49-ae46-eff7103a74f5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_7538fa82-f48c-474e-9364-ceb931c3a115" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:to="loc_us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_7538fa82-f48c-474e-9364-ceb931c3a115" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_3d44a94d-cb26-484c-8008-54ea2373a231" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_f148f10b-2a58-4d30-8039-44802d1eb272" xlink:to="loc_us-gaap_StatementTable_3d44a94d-cb26-484c-8008-54ea2373a231" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_b021d67f-210c-40aa-aae5-dbb536d19b3e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3d44a94d-cb26-484c-8008-54ea2373a231" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_b021d67f-210c-40aa-aae5-dbb536d19b3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_b021d67f-210c-40aa-aae5-dbb536d19b3e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_b021d67f-210c-40aa-aae5-dbb536d19b3e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_b021d67f-210c-40aa-aae5-dbb536d19b3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_eef5f218-6d04-4548-8291-6f34d7100337" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_b021d67f-210c-40aa-aae5-dbb536d19b3e" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_eef5f218-6d04-4548-8291-6f34d7100337" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_86bff8a2-c1fd-4345-94d4-1ffd4c3febd2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_eef5f218-6d04-4548-8291-6f34d7100337" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_86bff8a2-c1fd-4345-94d4-1ffd4c3febd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_74c01251-6302-4f7c-9688-6d8b25683c64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3d44a94d-cb26-484c-8008-54ea2373a231" xlink:to="loc_us-gaap_ValuationTechniqueAxis_74c01251-6302-4f7c-9688-6d8b25683c64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_74c01251-6302-4f7c-9688-6d8b25683c64_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_74c01251-6302-4f7c-9688-6d8b25683c64" xlink:to="loc_us-gaap_ValuationTechniqueDomain_74c01251-6302-4f7c-9688-6d8b25683c64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_3c02ea0a-8eda-4aae-94b6-bb66aabf57ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_74c01251-6302-4f7c-9688-6d8b25683c64" xlink:to="loc_us-gaap_ValuationTechniqueDomain_3c02ea0a-8eda-4aae-94b6-bb66aabf57ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_DCFMethodforFairValueEstimateMember_c0a0e7cc-6231-477a-b98e-1893be631329" xlink:href="tg-20210630.xsd#tg_DCFMethodforFairValueEstimateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_3c02ea0a-8eda-4aae-94b6-bb66aabf57ae" xlink:to="loc_tg_DCFMethodforFairValueEstimateMember_c0a0e7cc-6231-477a-b98e-1893be631329" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EBITDAMultipleMethodforFairValueEstimateMember_0b5af65e-7cc0-40c9-b8f7-69bfc33e2998" xlink:href="tg-20210630.xsd#tg_EBITDAMultipleMethodforFairValueEstimateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_3c02ea0a-8eda-4aae-94b6-bb66aabf57ae" xlink:to="loc_tg_EBITDAMultipleMethodforFairValueEstimateMember_0b5af65e-7cc0-40c9-b8f7-69bfc33e2998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_99622554-b17c-4132-96dd-9be149971f41" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3d44a94d-cb26-484c-8008-54ea2373a231" xlink:to="loc_dei_LegalEntityAxis_99622554-b17c-4132-96dd-9be149971f41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_99622554-b17c-4132-96dd-9be149971f41_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_99622554-b17c-4132-96dd-9be149971f41" xlink:to="loc_dei_EntityDomain_99622554-b17c-4132-96dd-9be149971f41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ed50d98c-942b-46b0-9e90-44c57f35fe72" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_99622554-b17c-4132-96dd-9be149971f41" xlink:to="loc_dei_EntityDomain_ed50d98c-942b-46b0-9e90-44c57f35fe72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_KaleoMember_da4a5ab8-8383-4402-b0b9-2a1c5c2502bd" xlink:href="tg-20210630.xsd#tg_KaleoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ed50d98c-942b-46b0-9e90-44c57f35fe72" xlink:to="loc_tg_KaleoMember_da4a5ab8-8383-4402-b0b9-2a1c5c2502bd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" xlink:type="simple" xlink:href="tg-20210630.xsd#DerivativeFinancialInstrumentsTables"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/DerivativeFinancialInstrumentsTables" xlink:type="extended" id="i7a6109b977dd4e0eae346ba1bc4de23b_DerivativeFinancialInstrumentsTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_fa1612ba-51be-47dc-8862-72937c743e17" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_453d1114-4e62-4e9e-9db2-c968591a40b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_fa1612ba-51be-47dc-8862-72937c743e17" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_453d1114-4e62-4e9e-9db2-c968591a40b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock_bbc4f6a1-1348-4ef4-88cc-e131f2d8151c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_fa1612ba-51be-47dc-8862-72937c743e17" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsEffectOnOtherComprehensiveIncomeLossTableTextBlock_bbc4f6a1-1348-4ef4-88cc-e131f2d8151c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_21233bb1-7149-40e2-b1f7-fdcc4b0eb0d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_eb413a3f-9c06-432a-b44e-009b736a9b51" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_fa1612ba-51be-47dc-8862-72937c743e17" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_eb413a3f-9c06-432a-b44e-009b736a9b51" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsTextBlock_87abcebd-eb03-492b-9568-59974e8ed557" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_fa1612ba-51be-47dc-8862-72937c743e17" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsTextBlock_87abcebd-eb03-492b-9568-59974e8ed557" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_f763eed0-ce04-4eed-8b56-99a1f67204f3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_fa1612ba-51be-47dc-8862-72937c743e17" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_f763eed0-ce04-4eed-8b56-99a1f67204f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_bf279091-39be-4675-afcc-cb17ec39fed7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_f763eed0-ce04-4eed-8b56-99a1f67204f3" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_bf279091-39be-4675-afcc-cb17ec39fed7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_bf279091-39be-4675-afcc-cb17ec39fed7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_bf279091-39be-4675-afcc-cb17ec39fed7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_bf279091-39be-4675-afcc-cb17ec39fed7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_876a2af3-d674-45e2-ae1e-7347313e1608" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_bf279091-39be-4675-afcc-cb17ec39fed7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_876a2af3-d674-45e2-ae1e-7347313e1608" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_4e0bd62a-e231-4e36-8cdd-ac405a92288c" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_876a2af3-d674-45e2-ae1e-7347313e1608" xlink:to="loc_tg_AluminumFuturesContractsMember_4e0bd62a-e231-4e36-8cdd-ac405a92288c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwardContractsMember_cf1024fe-1413-4ace-8bdd-708e5d6c97b7" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_876a2af3-d674-45e2-ae1e-7347313e1608" xlink:to="loc_tg_ForeignCurrencyForwardContractsMember_cf1024fe-1413-4ace-8bdd-708e5d6c97b7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#DerivativeFinancialInstrumentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/DerivativeFinancialInstrumentsNarrativeDetails" xlink:type="extended" id="i5d2f780d29a94bbc92b12f1abec0c8cd_DerivativeFinancialInstrumentsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_c7dedbac-eea8-4b35-bcde-4f53d6ad46db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_DerivativeNotionalAmount_c7dedbac-eea8-4b35-bcde-4f53d6ad46db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AnnualNetCostsMismatchTranslationExposureRealvsUSDollar_2e20f234-9039-46d2-978d-a899fb10542f" xlink:href="tg-20210630.xsd#tg_AnnualNetCostsMismatchTranslationExposureRealvsUSDollar"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_tg_AnnualNetCostsMismatchTranslationExposureRealvsUSDollar_2e20f234-9039-46d2-978d-a899fb10542f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet_5876724d-9f77-48f7-8db9-ef7516d136ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeDerivativeAtFairValueNet_5876724d-9f77-48f7-8db9-ef7516d136ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_cdfc69ba-5bf3-45dd-874e-39f27e836982" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_cdfc69ba-5bf3-45dd-874e-39f27e836982" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_b313a625-e485-451a-bbbd-1edcc938cdae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_b313a625-e485-451a-bbbd-1edcc938cdae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_49552808-1cae-49b1-9946-57e591142f1d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountMass"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_49552808-1cae-49b1-9946-57e591142f1d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_cfba6b6c-6519-484b-900f-75ecb25a2cfe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_cfba6b6c-6519-484b-900f-75ecb25a2cfe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_87222a9c-3170-413b-a534-7e003a398f5a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_87222a9c-3170-413b-a534-7e003a398f5a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CommitmentUnderCashFlowHedgesMass_f9b7d404-8c0c-4889-891e-4750067b94cd" xlink:href="tg-20210630.xsd#tg_CommitmentUnderCashFlowHedgesMass"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_tg_CommitmentUnderCashFlowHedgesMass_f9b7d404-8c0c-4889-891e-4750067b94cd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_25ff5743-29ff-4312-84bc-a3057671abdf" xlink:to="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CashFlowHedgeMaturityDateAxis_fb57f4dc-d4f0-4e2f-8212-797b7083abf4" xlink:href="tg-20210630.xsd#tg_CashFlowHedgeMaturityDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:to="loc_tg_CashFlowHedgeMaturityDateAxis_fb57f4dc-d4f0-4e2f-8212-797b7083abf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CashFlowHedgeMaturityDateDomain_fb57f4dc-d4f0-4e2f-8212-797b7083abf4_default" xlink:href="tg-20210630.xsd#tg_CashFlowHedgeMaturityDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tg_CashFlowHedgeMaturityDateAxis_fb57f4dc-d4f0-4e2f-8212-797b7083abf4" xlink:to="loc_tg_CashFlowHedgeMaturityDateDomain_fb57f4dc-d4f0-4e2f-8212-797b7083abf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CashFlowHedgeMaturityDateDomain_515a48f3-6806-4b46-ad83-d9f5ada333f1" xlink:href="tg-20210630.xsd#tg_CashFlowHedgeMaturityDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tg_CashFlowHedgeMaturityDateAxis_fb57f4dc-d4f0-4e2f-8212-797b7083abf4" xlink:to="loc_tg_CashFlowHedgeMaturityDateDomain_515a48f3-6806-4b46-ad83-d9f5ada333f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Oct2018Member_d41e8682-8dbf-4cff-9ea7-aa3c662ecc27" xlink:href="tg-20210630.xsd#tg_Oct2018Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_515a48f3-6806-4b46-ad83-d9f5ada333f1" xlink:to="loc_tg_Oct2018Member_d41e8682-8dbf-4cff-9ea7-aa3c662ecc27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9fb8669d-165a-435a-ac44-0a318a5cc48d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9fb8669d-165a-435a-ac44-0a318a5cc48d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_9fb8669d-165a-435a-ac44-0a318a5cc48d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9fb8669d-165a-435a-ac44-0a318a5cc48d" xlink:to="loc_us-gaap_HedgingRelationshipDomain_9fb8669d-165a-435a-ac44-0a318a5cc48d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_3576a5f9-407e-42e5-add5-b371d392e5bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9fb8669d-165a-435a-ac44-0a318a5cc48d" xlink:to="loc_us-gaap_HedgingRelationshipDomain_3576a5f9-407e-42e5-add5-b371d392e5bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_642496e9-3af7-4558-984b-6089774e4046" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_3576a5f9-407e-42e5-add5-b371d392e5bd" xlink:to="loc_us-gaap_CashFlowHedgingMember_642496e9-3af7-4558-984b-6089774e4046" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_d80a7274-ed09-4aff-bc03-bf9a8eaf3da0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_d80a7274-ed09-4aff-bc03-bf9a8eaf3da0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d80a7274-ed09-4aff-bc03-bf9a8eaf3da0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d80a7274-ed09-4aff-bc03-bf9a8eaf3da0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d80a7274-ed09-4aff-bc03-bf9a8eaf3da0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_7477d765-f7c7-49c7-a26b-be424b2022f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d80a7274-ed09-4aff-bc03-bf9a8eaf3da0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_7477d765-f7c7-49c7-a26b-be424b2022f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_72ad8692-7d77-4f2f-8019-c52152fb2482" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_7477d765-f7c7-49c7-a26b-be424b2022f4" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_72ad8692-7d77-4f2f-8019-c52152fb2482" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_04ffde00-632f-4b3d-bd90-70cc326ffa00" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_7477d765-f7c7-49c7-a26b-be424b2022f4" xlink:to="loc_us-gaap_CostOfSalesMember_04ffde00-632f-4b3d-bd90-70cc326ffa00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_a6fd5efe-368c-4d9a-a5aa-8a0144407a9e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_a6fd5efe-368c-4d9a-a5aa-8a0144407a9e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_a6fd5efe-368c-4d9a-a5aa-8a0144407a9e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_a6fd5efe-368c-4d9a-a5aa-8a0144407a9e" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_a6fd5efe-368c-4d9a-a5aa-8a0144407a9e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_5191440c-eec6-4c60-8c89-c86f9bfd19f6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_a6fd5efe-368c-4d9a-a5aa-8a0144407a9e" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_5191440c-eec6-4c60-8c89-c86f9bfd19f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PrepaidExpensesAndOtherMember_f55f27cd-2de6-4ab4-bb81-e0e6eb1ff940" xlink:href="tg-20210630.xsd#tg_PrepaidExpensesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5191440c-eec6-4c60-8c89-c86f9bfd19f6" xlink:to="loc_tg_PrepaidExpensesAndOtherMember_f55f27cd-2de6-4ab4-bb81-e0e6eb1ff940" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AccruedExpensesMember_765bee7b-2a4f-4802-a48b-08b9c6e243f9" xlink:href="tg-20210630.xsd#tg_AccruedExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5191440c-eec6-4c60-8c89-c86f9bfd19f6" xlink:to="loc_tg_AccruedExpensesMember_765bee7b-2a4f-4802-a48b-08b9c6e243f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_a3a61e2d-e550-40e3-84d5-d6e7e76bd34a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:to="loc_us-gaap_HedgingDesignationAxis_a3a61e2d-e550-40e3-84d5-d6e7e76bd34a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_a3a61e2d-e550-40e3-84d5-d6e7e76bd34a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_a3a61e2d-e550-40e3-84d5-d6e7e76bd34a" xlink:to="loc_us-gaap_HedgingDesignationDomain_a3a61e2d-e550-40e3-84d5-d6e7e76bd34a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_0b527c97-7fff-4a7f-9131-125cf429c72b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_a3a61e2d-e550-40e3-84d5-d6e7e76bd34a" xlink:to="loc_us-gaap_HedgingDesignationDomain_0b527c97-7fff-4a7f-9131-125cf429c72b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_79e098ff-0466-49fb-8335-055c29789b59" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_0b527c97-7fff-4a7f-9131-125cf429c72b" xlink:to="loc_us-gaap_NondesignatedMember_79e098ff-0466-49fb-8335-055c29789b59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_291a3ba8-9803-4b71-a5ab-5045c1959645" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_0b527c97-7fff-4a7f-9131-125cf429c72b" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_291a3ba8-9803-4b71-a5ab-5045c1959645" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_5bdeac5f-8433-4462-9b2d-c0ef74fa7920" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_55e25926-4340-483a-a147-5422960e4085" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_5bdeac5f-8433-4462-9b2d-c0ef74fa7920" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_5bdeac5f-8433-4462-9b2d-c0ef74fa7920_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_5bdeac5f-8433-4462-9b2d-c0ef74fa7920" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_5bdeac5f-8433-4462-9b2d-c0ef74fa7920_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_5bdeac5f-8433-4462-9b2d-c0ef74fa7920" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_85b0a69d-6069-4006-9a36-7c7d881c5288" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:to="loc_tg_AluminumFuturesContractsMember_85b0a69d-6069-4006-9a36-7c7d881c5288" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TerphaneLtdaMember_8f1020a6-712f-41c4-bd7d-05c761f06317" xlink:href="tg-20210630.xsd#tg_TerphaneLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:to="loc_tg_TerphaneLtdaMember_8f1020a6-712f-41c4-bd7d-05c761f06317" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmProductsForeignCurrencyContractForwardContractMember_bb36dc54-21cd-4ea5-808c-9dda9fea4fac" xlink:href="tg-20210630.xsd#tg_FilmProductsForeignCurrencyContractForwardContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:to="loc_tg_FilmProductsForeignCurrencyContractForwardContractMember_bb36dc54-21cd-4ea5-808c-9dda9fea4fac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwardsAndOptionsMember_3e95108b-4fe0-44d4-87df-219df288cec9" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwardsAndOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:to="loc_tg_ForeignCurrencyForwardsAndOptionsMember_3e95108b-4fe0-44d4-87df-219df288cec9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwwardsAndOptionsMember_289b9fcd-a075-4f88-91bc-202b8f84ec31" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwwardsAndOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_48f6ee31-e3ac-4b49-a06a-d6ef99bb4f18" xlink:to="loc_tg_ForeignCurrencyForwwardsAndOptionsMember_289b9fcd-a075-4f88-91bc-202b8f84ec31" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails" xlink:type="extended" id="i7286f0ed9a3e4961a26f16be09abcc34_DerivativeFinancialInstrumentsSummaryOfLocationAndFairValueOfDerivativeFinancialInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_d962af72-0b2d-4a62-ad75-02ff5427b817" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_e71a76f2-af0c-4dab-bab5-4a3967146778" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_d962af72-0b2d-4a62-ad75-02ff5427b817" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_e71a76f2-af0c-4dab-bab5-4a3967146778" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_73a1c404-345b-46b6-998f-551944ecb779" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_d962af72-0b2d-4a62-ad75-02ff5427b817" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_73a1c404-345b-46b6-998f-551944ecb779" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_000d8fe8-3bc0-428f-ba8e-597276f0f79a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_d962af72-0b2d-4a62-ad75-02ff5427b817" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_000d8fe8-3bc0-428f-ba8e-597276f0f79a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_7ba18436-ad2e-4174-b89a-ad44edf2e2bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_d962af72-0b2d-4a62-ad75-02ff5427b817" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_7ba18436-ad2e-4174-b89a-ad44edf2e2bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_826d616a-dfde-4396-a780-b65b81a526b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_d962af72-0b2d-4a62-ad75-02ff5427b817" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_826d616a-dfde-4396-a780-b65b81a526b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_3d203d62-11c3-4a12-b293-d974a3e347d5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_826d616a-dfde-4396-a780-b65b81a526b3" xlink:to="loc_us-gaap_HedgingDesignationAxis_3d203d62-11c3-4a12-b293-d974a3e347d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_3d203d62-11c3-4a12-b293-d974a3e347d5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_3d203d62-11c3-4a12-b293-d974a3e347d5" xlink:to="loc_us-gaap_HedgingDesignationDomain_3d203d62-11c3-4a12-b293-d974a3e347d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_5b046c2c-2697-452c-840e-8b7ddaaca53a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_3d203d62-11c3-4a12-b293-d974a3e347d5" xlink:to="loc_us-gaap_HedgingDesignationDomain_5b046c2c-2697-452c-840e-8b7ddaaca53a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_5cbc4ede-e4a2-4ddf-ae56-5e6833e0901d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_5b046c2c-2697-452c-840e-8b7ddaaca53a" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_5cbc4ede-e4a2-4ddf-ae56-5e6833e0901d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_b11bcaaa-94d4-4b35-ba68-b3475ffe3290" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_5b046c2c-2697-452c-840e-8b7ddaaca53a" xlink:to="loc_us-gaap_NondesignatedMember_b11bcaaa-94d4-4b35-ba68-b3475ffe3290" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_49b201fb-ff71-4a4e-aac3-6da78406902a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_826d616a-dfde-4396-a780-b65b81a526b3" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_49b201fb-ff71-4a4e-aac3-6da78406902a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_49b201fb-ff71-4a4e-aac3-6da78406902a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_49b201fb-ff71-4a4e-aac3-6da78406902a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_49b201fb-ff71-4a4e-aac3-6da78406902a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_0069e3e1-482b-49ab-a19b-889545a7cdaa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_49b201fb-ff71-4a4e-aac3-6da78406902a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_0069e3e1-482b-49ab-a19b-889545a7cdaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMemberDomain_0e3ca1f4-2eda-4d3d-8946-91d58da978ac" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMemberDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_0069e3e1-482b-49ab-a19b-889545a7cdaa" xlink:to="loc_tg_FlexiblePackagingFilmsMemberDomain_0e3ca1f4-2eda-4d3d-8946-91d58da978ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_4638eeaa-fe15-4cb5-bcc4-bc64f2fe46e4" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_0069e3e1-482b-49ab-a19b-889545a7cdaa" xlink:to="loc_tg_AluminumFuturesContractsMember_4638eeaa-fe15-4cb5-bcc4-bc64f2fe46e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmProductsForeignCurrencyContractForwardContractMember_8e91a8bf-2659-490a-a618-ad5e52bde273" xlink:href="tg-20210630.xsd#tg_FilmProductsForeignCurrencyContractForwardContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_0069e3e1-482b-49ab-a19b-889545a7cdaa" xlink:to="loc_tg_FilmProductsForeignCurrencyContractForwardContractMember_8e91a8bf-2659-490a-a618-ad5e52bde273" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_de21c741-6d1e-41c2-8656-c6c50816dcf1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_826d616a-dfde-4396-a780-b65b81a526b3" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_de21c741-6d1e-41c2-8656-c6c50816dcf1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_de21c741-6d1e-41c2-8656-c6c50816dcf1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_de21c741-6d1e-41c2-8656-c6c50816dcf1" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_de21c741-6d1e-41c2-8656-c6c50816dcf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_75ba8aa1-ba59-41b9-be59-8aeca069a2f9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_de21c741-6d1e-41c2-8656-c6c50816dcf1" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_75ba8aa1-ba59-41b9-be59-8aeca069a2f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AccruedExpensesMember_70e1029f-83df-4bd1-9d01-7d5e59511728" xlink:href="tg-20210630.xsd#tg_AccruedExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_75ba8aa1-ba59-41b9-be59-8aeca069a2f9" xlink:to="loc_tg_AccruedExpensesMember_70e1029f-83df-4bd1-9d01-7d5e59511728" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_27d5045a-ead9-4941-a9f3-421cc61b6627" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_75ba8aa1-ba59-41b9-be59-8aeca069a2f9" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_27d5045a-ead9-4941-a9f3-421cc61b6627" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails" xlink:type="extended" id="i5d3fcaf3e5d74116afe90540063e99cf_DerivativeFinancialInstrumentsScheduleOfPretaxEffectOnNetIncomeLossAndOtherComprehensiveIncomeLossOfDerivativeInstrumentsClassifiedAsCashFlowHedgesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b20260e-0c07-4524-9886-e8bcaeddaca4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_4203b3c8-bb70-4bc4-8060-6a25d79ebcfe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b20260e-0c07-4524-9886-e8bcaeddaca4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_4203b3c8-bb70-4bc4-8060-6a25d79ebcfe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_a48dc0ac-b53e-42b4-a226-1afa6af149e0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b20260e-0c07-4524-9886-e8bcaeddaca4" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_a48dc0ac-b53e-42b4-a226-1afa6af149e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_000bcba3-6d96-482f-9a4c-134d7162cf64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b20260e-0c07-4524-9886-e8bcaeddaca4" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_000bcba3-6d96-482f-9a4c-134d7162cf64" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_896089bb-96a4-4601-bd6f-fa7412df826c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_000bcba3-6d96-482f-9a4c-134d7162cf64" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_896089bb-96a4-4601-bd6f-fa7412df826c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_896089bb-96a4-4601-bd6f-fa7412df826c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_896089bb-96a4-4601-bd6f-fa7412df826c" xlink:to="loc_us-gaap_HedgingRelationshipDomain_896089bb-96a4-4601-bd6f-fa7412df826c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_8b9f9608-30c2-4699-b2a7-3f5b9233a088" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_896089bb-96a4-4601-bd6f-fa7412df826c" xlink:to="loc_us-gaap_HedgingRelationshipDomain_8b9f9608-30c2-4699-b2a7-3f5b9233a088" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_8e98f217-f3ad-441a-8c8a-103b7b2ac604" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_8b9f9608-30c2-4699-b2a7-3f5b9233a088" xlink:to="loc_us-gaap_CashFlowHedgingMember_8e98f217-f3ad-441a-8c8a-103b7b2ac604" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_03f924dd-bfb5-4aca-b89a-cfd01fa53fae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_000bcba3-6d96-482f-9a4c-134d7162cf64" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_03f924dd-bfb5-4aca-b89a-cfd01fa53fae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_03f924dd-bfb5-4aca-b89a-cfd01fa53fae_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_03f924dd-bfb5-4aca-b89a-cfd01fa53fae" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_03f924dd-bfb5-4aca-b89a-cfd01fa53fae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_b154e4ca-d551-459a-9c6b-70d187a7c4a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_03f924dd-bfb5-4aca-b89a-cfd01fa53fae" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_b154e4ca-d551-459a-9c6b-70d187a7c4a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumFuturesContractsMember_e245e468-0dd3-4f33-96d7-fba3edec8210" xlink:href="tg-20210630.xsd#tg_AluminumFuturesContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_b154e4ca-d551-459a-9c6b-70d187a7c4a9" xlink:to="loc_tg_AluminumFuturesContractsMember_e245e468-0dd3-4f33-96d7-fba3edec8210" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwwardsAndOptionsMember_521e7fed-df0f-4e5d-a1ca-f082920ba273" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwwardsAndOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_b154e4ca-d551-459a-9c6b-70d187a7c4a9" xlink:to="loc_tg_ForeignCurrencyForwwardsAndOptionsMember_521e7fed-df0f-4e5d-a1ca-f082920ba273" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignCurrencyForwardsAndOptionsMember_fbdf0180-0510-430f-a432-84e05c0d4c05" xlink:href="tg-20210630.xsd#tg_ForeignCurrencyForwardsAndOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_b154e4ca-d551-459a-9c6b-70d187a7c4a9" xlink:to="loc_tg_ForeignCurrencyForwardsAndOptionsMember_fbdf0180-0510-430f-a432-84e05c0d4c05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_d7f15b8f-42dc-4b37-99de-e4197a80a19a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_000bcba3-6d96-482f-9a4c-134d7162cf64" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_d7f15b8f-42dc-4b37-99de-e4197a80a19a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d7f15b8f-42dc-4b37-99de-e4197a80a19a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d7f15b8f-42dc-4b37-99de-e4197a80a19a" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d7f15b8f-42dc-4b37-99de-e4197a80a19a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_4aff64f9-7d89-453d-82c4-6ca7e9c32f89" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d7f15b8f-42dc-4b37-99de-e4197a80a19a" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_4aff64f9-7d89-453d-82c4-6ca7e9c32f89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_0ea2f342-072b-4e2c-972c-c14df867e749" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_4aff64f9-7d89-453d-82c4-6ca7e9c32f89" xlink:to="loc_us-gaap_CostOfSalesMember_0ea2f342-072b-4e2c-972c-c14df867e749" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_c399c611-0ed3-4d80-aeec-a531ce1a8e49" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_4aff64f9-7d89-453d-82c4-6ca7e9c32f89" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_c399c611-0ed3-4d80-aeec-a531ce1a8e49" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails" xlink:type="extended" id="i67e46039b2334828ac8e4339df1f1b59_DerivativeFinancialInstrumentsTerphaneFutureCashFlowHedgesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_bcd5d3f4-b544-4eea-b1de-544d32b7fff3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_5b467007-03e0-4a31-8184-ff2a76dd7b36" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_bcd5d3f4-b544-4eea-b1de-544d32b7fff3" xlink:to="loc_us-gaap_DerivativeNotionalAmount_5b467007-03e0-4a31-8184-ff2a76dd7b36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PercentageofCoverageUsingCashFlowHedges_ab740c67-f134-49a2-a5b5-5ca473a3f952" xlink:href="tg-20210630.xsd#tg_PercentageofCoverageUsingCashFlowHedges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_bcd5d3f4-b544-4eea-b1de-544d32b7fff3" xlink:to="loc_tg_PercentageofCoverageUsingCashFlowHedges_ab740c67-f134-49a2-a5b5-5ca473a3f952" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyExchangeRateTranslation1_07d1a7b3-fd3d-4be2-9446-6d45220edd81" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyExchangeRateTranslation1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_bcd5d3f4-b544-4eea-b1de-544d32b7fff3" xlink:to="loc_us-gaap_ForeignCurrencyExchangeRateTranslation1_07d1a7b3-fd3d-4be2-9446-6d45220edd81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_bcd5d3f4-b544-4eea-b1de-544d32b7fff3" xlink:to="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CashFlowHedgeMaturityDateAxis_2350bede-3290-4c07-8eb6-ccba31a7fc05" xlink:href="tg-20210630.xsd#tg_CashFlowHedgeMaturityDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:to="loc_tg_CashFlowHedgeMaturityDateAxis_2350bede-3290-4c07-8eb6-ccba31a7fc05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CashFlowHedgeMaturityDateDomain_2350bede-3290-4c07-8eb6-ccba31a7fc05_default" xlink:href="tg-20210630.xsd#tg_CashFlowHedgeMaturityDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tg_CashFlowHedgeMaturityDateAxis_2350bede-3290-4c07-8eb6-ccba31a7fc05" xlink:to="loc_tg_CashFlowHedgeMaturityDateDomain_2350bede-3290-4c07-8eb6-ccba31a7fc05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:href="tg-20210630.xsd#tg_CashFlowHedgeMaturityDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tg_CashFlowHedgeMaturityDateAxis_2350bede-3290-4c07-8eb6-ccba31a7fc05" xlink:to="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Oct2018Member_95007fb7-97ce-4585-ac1b-c71ed3e507ea" xlink:href="tg-20210630.xsd#tg_Oct2018Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Oct2018Member_95007fb7-97ce-4585-ac1b-c71ed3e507ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Nov18Member_c98d990b-1a9d-4df2-a84f-098ced613a44" xlink:href="tg-20210630.xsd#tg_Nov18Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Nov18Member_c98d990b-1a9d-4df2-a84f-098ced613a44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Dec18Member_0f2c6c50-cac1-4ca9-8f0b-e8aa937fe1ce" xlink:href="tg-20210630.xsd#tg_Dec18Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Dec18Member_0f2c6c50-cac1-4ca9-8f0b-e8aa937fe1ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jan19Member_5fa6f5e4-b2bb-4cca-92c3-88ada3a588e7" xlink:href="tg-20210630.xsd#tg_Jan19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jan19Member_5fa6f5e4-b2bb-4cca-92c3-88ada3a588e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Feb19Member_0365069d-5c47-46ff-9f02-d94c00f53b51" xlink:href="tg-20210630.xsd#tg_Feb19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Feb19Member_0365069d-5c47-46ff-9f02-d94c00f53b51" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Mar19Member_ec43ec58-242f-4fb1-b8e5-cd55e7019730" xlink:href="tg-20210630.xsd#tg_Mar19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Mar19Member_ec43ec58-242f-4fb1-b8e5-cd55e7019730" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Apr19Member_5e2549d1-7f56-42bb-b058-952b851d83b1" xlink:href="tg-20210630.xsd#tg_Apr19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Apr19Member_5e2549d1-7f56-42bb-b058-952b851d83b1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_May19Member_0dcb7075-93f5-4c70-a119-9c8285001b6a" xlink:href="tg-20210630.xsd#tg_May19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_May19Member_0dcb7075-93f5-4c70-a119-9c8285001b6a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jun19Member_6688b512-39b3-42f4-a009-5527d6a859f8" xlink:href="tg-20210630.xsd#tg_Jun19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jun19Member_6688b512-39b3-42f4-a009-5527d6a859f8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jul19Member_818716f2-49a3-48de-869e-56bbc4bdc489" xlink:href="tg-20210630.xsd#tg_Jul19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jul19Member_818716f2-49a3-48de-869e-56bbc4bdc489" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Aug19Member_49637f38-f442-40f0-b1ea-f1b025a391b0" xlink:href="tg-20210630.xsd#tg_Aug19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Aug19Member_49637f38-f442-40f0-b1ea-f1b025a391b0" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Sep19Member_ae6f34d3-fb20-434d-9409-845c7d73a44a" xlink:href="tg-20210630.xsd#tg_Sep19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Sep19Member_ae6f34d3-fb20-434d-9409-845c7d73a44a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Oct19Member_e889d56e-241b-4a9f-a4e3-78719f7ac5f8" xlink:href="tg-20210630.xsd#tg_Oct19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Oct19Member_e889d56e-241b-4a9f-a4e3-78719f7ac5f8" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Nov19Member_ef460ed9-73c3-46fa-8497-b657d928f6c4" xlink:href="tg-20210630.xsd#tg_Nov19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Nov19Member_ef460ed9-73c3-46fa-8497-b657d928f6c4" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Dec19Member_5039d800-ded1-4e6b-85e4-d0a3447d8e69" xlink:href="tg-20210630.xsd#tg_Dec19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Dec19Member_5039d800-ded1-4e6b-85e4-d0a3447d8e69" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jan20MemberMember_3156c968-29c6-428f-b5c7-38d83ee98877" xlink:href="tg-20210630.xsd#tg_Jan20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jan20MemberMember_3156c968-29c6-428f-b5c7-38d83ee98877" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Feb20MemberMember_7a51a356-029f-4c93-ac2d-c32e4abb8548" xlink:href="tg-20210630.xsd#tg_Feb20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Feb20MemberMember_7a51a356-029f-4c93-ac2d-c32e4abb8548" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Mar20MemberMember_95c77d97-b1f0-4317-a97c-653bdb2945fb" xlink:href="tg-20210630.xsd#tg_Mar20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Mar20MemberMember_95c77d97-b1f0-4317-a97c-653bdb2945fb" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Apr20MemberMember_bd7a168d-2dd5-44a8-bc11-c166413096d9" xlink:href="tg-20210630.xsd#tg_Apr20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Apr20MemberMember_bd7a168d-2dd5-44a8-bc11-c166413096d9" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_May20MemberMember_07f83cc7-5c01-463d-a73b-2b9b93dddb65" xlink:href="tg-20210630.xsd#tg_May20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_May20MemberMember_07f83cc7-5c01-463d-a73b-2b9b93dddb65" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jun20MemberMember_add6bb7e-b378-4dd1-bc58-42185275602d" xlink:href="tg-20210630.xsd#tg_Jun20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jun20MemberMember_add6bb7e-b378-4dd1-bc58-42185275602d" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jul20MemberMember_c92febdd-4a6f-4cb4-a65c-93fcbe2b0d78" xlink:href="tg-20210630.xsd#tg_Jul20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jul20MemberMember_c92febdd-4a6f-4cb4-a65c-93fcbe2b0d78" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Aug20MemberMember_92f2c8a7-e07c-405b-bcca-b4b16fee3f4e" xlink:href="tg-20210630.xsd#tg_Aug20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Aug20MemberMember_92f2c8a7-e07c-405b-bcca-b4b16fee3f4e" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Sep20MemberMember_e5ae3a48-d0d6-4b57-9c21-c46a96a0d0ee" xlink:href="tg-20210630.xsd#tg_Sep20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Sep20MemberMember_e5ae3a48-d0d6-4b57-9c21-c46a96a0d0ee" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Oct20MemberMember_919376d5-bbc0-4b73-a896-3308b7cf6d37" xlink:href="tg-20210630.xsd#tg_Oct20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Oct20MemberMember_919376d5-bbc0-4b73-a896-3308b7cf6d37" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Nov20MemberMember_7b60c47d-2e98-48c5-82b8-d02e2470aae6" xlink:href="tg-20210630.xsd#tg_Nov20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Nov20MemberMember_7b60c47d-2e98-48c5-82b8-d02e2470aae6" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Dec20MemberMember_d2a3ba04-539a-4f9c-a413-05869948e1e1" xlink:href="tg-20210630.xsd#tg_Dec20MemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Dec20MemberMember_d2a3ba04-539a-4f9c-a413-05869948e1e1" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jan21Member_9c6f225f-62be-4f3b-8fde-a676fdc1f4e2" xlink:href="tg-20210630.xsd#tg_Jan21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jan21Member_9c6f225f-62be-4f3b-8fde-a676fdc1f4e2" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Feb21Member_21e77bcf-8ef3-46e9-8e90-b7b6cffbea7b" xlink:href="tg-20210630.xsd#tg_Feb21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Feb21Member_21e77bcf-8ef3-46e9-8e90-b7b6cffbea7b" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Mar21Member_ee82f5c7-ca18-4f6d-8e2f-db10971ba9b4" xlink:href="tg-20210630.xsd#tg_Mar21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Mar21Member_ee82f5c7-ca18-4f6d-8e2f-db10971ba9b4" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Apr21Member_73888224-1c9a-4fbe-8d28-9a614110b913" xlink:href="tg-20210630.xsd#tg_Apr21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Apr21Member_73888224-1c9a-4fbe-8d28-9a614110b913" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_May21Member_1bfe162e-2ba6-4b5a-a93c-2ba761c49bf3" xlink:href="tg-20210630.xsd#tg_May21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_May21Member_1bfe162e-2ba6-4b5a-a93c-2ba761c49bf3" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jun21Member_ed7448bd-6116-4881-b7d7-afb703e8deee" xlink:href="tg-20210630.xsd#tg_Jun21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jun21Member_ed7448bd-6116-4881-b7d7-afb703e8deee" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Jul21Member_605e80ac-f042-4ade-a5ea-13563006e92e" xlink:href="tg-20210630.xsd#tg_Jul21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Jul21Member_605e80ac-f042-4ade-a5ea-13563006e92e" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Aug21Member_b9c044e1-09a7-409b-81dd-cbf690ccfa29" xlink:href="tg-20210630.xsd#tg_Aug21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Aug21Member_b9c044e1-09a7-409b-81dd-cbf690ccfa29" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Sep21Member_c8277195-496b-4678-a12c-aa3db6408c22" xlink:href="tg-20210630.xsd#tg_Sep21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Sep21Member_c8277195-496b-4678-a12c-aa3db6408c22" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Oct21Member_327b325e-e6b0-4a29-a394-6fe51fa528bd" xlink:href="tg-20210630.xsd#tg_Oct21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Oct21Member_327b325e-e6b0-4a29-a394-6fe51fa528bd" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Nov21Member_eed4d6cb-ee49-4566-944e-6140098bcd7d" xlink:href="tg-20210630.xsd#tg_Nov21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Nov21Member_eed4d6cb-ee49-4566-944e-6140098bcd7d" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Dec21Member_78a2103f-bb57-4757-aa2b-d17a83f86367" xlink:href="tg-20210630.xsd#tg_Dec21Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_CashFlowHedgeMaturityDateDomain_c72427a7-3824-4fa5-8ad6-189a07cbd6c2" xlink:to="loc_tg_Dec21Member_78a2103f-bb57-4757-aa2b-d17a83f86367" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_63f81477-bb1a-436a-9810-1dc07f65128b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_63f81477-bb1a-436a-9810-1dc07f65128b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_63f81477-bb1a-436a-9810-1dc07f65128b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_63f81477-bb1a-436a-9810-1dc07f65128b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_63f81477-bb1a-436a-9810-1dc07f65128b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_6b48b392-def9-4dd0-9109-c8489868dd50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_63f81477-bb1a-436a-9810-1dc07f65128b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_6b48b392-def9-4dd0-9109-c8489868dd50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TerphaneLtdaMember_3ee05b14-b10a-42b8-a13b-45675a20e35a" xlink:href="tg-20210630.xsd#tg_TerphaneLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6b48b392-def9-4dd0-9109-c8489868dd50" xlink:to="loc_tg_TerphaneLtdaMember_3ee05b14-b10a-42b8-a13b-45675a20e35a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyAxis_39239997-f743-42f9-b952-a65928db5bbf" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:to="loc_srt_EnergyAxis_39239997-f743-42f9-b952-a65928db5bbf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_39239997-f743-42f9-b952-a65928db5bbf_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_EnergyAxis_39239997-f743-42f9-b952-a65928db5bbf" xlink:to="loc_srt_EnergyDomain_39239997-f743-42f9-b952-a65928db5bbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_73d65bf8-f96e-4fdf-8e9f-68f51f677555" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_EnergyAxis_39239997-f743-42f9-b952-a65928db5bbf" xlink:to="loc_srt_EnergyDomain_73d65bf8-f96e-4fdf-8e9f-68f51f677555" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_52ed5859-0ff7-41cf-907d-99f6c93b6c73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:to="loc_us-gaap_VariableRateAxis_52ed5859-0ff7-41cf-907d-99f6c93b6c73" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_52ed5859-0ff7-41cf-907d-99f6c93b6c73_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_52ed5859-0ff7-41cf-907d-99f6c93b6c73" xlink:to="loc_us-gaap_VariableRateDomain_52ed5859-0ff7-41cf-907d-99f6c93b6c73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_af5fc81a-1858-4c61-baf9-4ddfa2ffa01c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_52ed5859-0ff7-41cf-907d-99f6c93b6c73" xlink:to="loc_us-gaap_VariableRateDomain_af5fc81a-1858-4c61-baf9-4ddfa2ffa01c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_e7f24a8a-4fb6-4b2f-82df-b76e7f9a6c80" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:to="loc_us-gaap_PositionAxis_e7f24a8a-4fb6-4b2f-82df-b76e7f9a6c80" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_e7f24a8a-4fb6-4b2f-82df-b76e7f9a6c80_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_e7f24a8a-4fb6-4b2f-82df-b76e7f9a6c80" xlink:to="loc_us-gaap_PositionDomain_e7f24a8a-4fb6-4b2f-82df-b76e7f9a6c80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_f68f0363-e050-4e8c-807e-1b755a639744" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_e7f24a8a-4fb6-4b2f-82df-b76e7f9a6c80" xlink:to="loc_us-gaap_PositionDomain_f68f0363-e050-4e8c-807e-1b755a639744" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_416049fa-38ab-4aa3-bc7a-86a8f7ca9be5" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_37e89ccd-daff-4e5f-a1ef-31fa7c1d1b67" xlink:to="loc_srt_RangeAxis_416049fa-38ab-4aa3-bc7a-86a8f7ca9be5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_416049fa-38ab-4aa3-bc7a-86a8f7ca9be5_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_416049fa-38ab-4aa3-bc7a-86a8f7ca9be5" xlink:to="loc_srt_RangeMember_416049fa-38ab-4aa3-bc7a-86a8f7ca9be5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a5b3ca12-c184-47ed-b1e3-af6a19026dbd" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_416049fa-38ab-4aa3-bc7a-86a8f7ca9be5" xlink:to="loc_srt_RangeMember_a5b3ca12-c184-47ed-b1e3-af6a19026dbd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" xlink:type="simple" xlink:href="tg-20210630.xsd#PensionAndOtherPostRetirementBenefitsTables"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsTables" xlink:type="extended" id="i4caea2550e3241f2ad6ea066c6c66baa_PensionAndOtherPostRetirementBenefitsTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f724415-6e3a-47ee-aa71-3240ae4d5817" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock_eee7b7c3-712e-4c15-8771-114667c5124f" xlink:href="tg-20210630.xsd#tg_ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f724415-6e3a-47ee-aa71-3240ae4d5817" xlink:to="loc_tg_ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock_eee7b7c3-712e-4c15-8771-114667c5124f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f724415-6e3a-47ee-aa71-3240ae4d5817" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_1cb3512d-5b6f-44fc-88e6-aed6889312c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_1cb3512d-5b6f-44fc-88e6-aed6889312c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1cb3512d-5b6f-44fc-88e6-aed6889312c6_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1cb3512d-5b6f-44fc-88e6-aed6889312c6" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1cb3512d-5b6f-44fc-88e6-aed6889312c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_0623825b-f628-4e49-a80a-7b8db4997561" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1cb3512d-5b6f-44fc-88e6-aed6889312c6" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_0623825b-f628-4e49-a80a-7b8db4997561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_d54dd0c4-c1f7-4254-baee-ac8e93f1afb1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_d54dd0c4-c1f7-4254-baee-ac8e93f1afb1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_d54dd0c4-c1f7-4254-baee-ac8e93f1afb1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_d54dd0c4-c1f7-4254-baee-ac8e93f1afb1" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_d54dd0c4-c1f7-4254-baee-ac8e93f1afb1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_42e5062e-f214-497c-a491-dc46da76c5ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_d54dd0c4-c1f7-4254-baee-ac8e93f1afb1" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_42e5062e-f214-497c-a491-dc46da76c5ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTaxStatusAxis_8be5dd33-e2d3-416b-a5cd-b00f7fe78643" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTaxStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:to="loc_us-gaap_RetirementPlanTaxStatusAxis_8be5dd33-e2d3-416b-a5cd-b00f7fe78643" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTaxStatusDomain_8be5dd33-e2d3-416b-a5cd-b00f7fe78643_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTaxStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTaxStatusAxis_8be5dd33-e2d3-416b-a5cd-b00f7fe78643" xlink:to="loc_us-gaap_RetirementPlanTaxStatusDomain_8be5dd33-e2d3-416b-a5cd-b00f7fe78643_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTaxStatusDomain_2df9cc1a-9d57-4f29-82f2-8edcf1e968c3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTaxStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTaxStatusAxis_8be5dd33-e2d3-416b-a5cd-b00f7fe78643" xlink:to="loc_us-gaap_RetirementPlanTaxStatusDomain_2df9cc1a-9d57-4f29-82f2-8edcf1e968c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanFundingStatusAxis_9855c36b-40ea-4b2c-a816-dcec6d1cd320" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanFundingStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:to="loc_us-gaap_RetirementPlanFundingStatusAxis_9855c36b-40ea-4b2c-a816-dcec6d1cd320" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanFundingStatusDomain_9855c36b-40ea-4b2c-a816-dcec6d1cd320_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanFundingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanFundingStatusAxis_9855c36b-40ea-4b2c-a816-dcec6d1cd320" xlink:to="loc_us-gaap_RetirementPlanFundingStatusDomain_9855c36b-40ea-4b2c-a816-dcec6d1cd320_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanFundingStatusDomain_0e1486e5-2004-4310-83ef-d182b482adfe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanFundingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanFundingStatusAxis_9855c36b-40ea-4b2c-a816-dcec6d1cd320" xlink:to="loc_us-gaap_RetirementPlanFundingStatusDomain_0e1486e5-2004-4310-83ef-d182b482adfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameAxis_17c74462-041d-46bf-b7b0-949b1cf590e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_dbe76bd2-adbd-4174-8f2d-4c76c62ab89e" xlink:to="loc_us-gaap_RetirementPlanNameAxis_17c74462-041d-46bf-b7b0-949b1cf590e1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_17c74462-041d-46bf-b7b0-949b1cf590e1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_17c74462-041d-46bf-b7b0-949b1cf590e1" xlink:to="loc_us-gaap_RetirementPlanNameDomain_17c74462-041d-46bf-b7b0-949b1cf590e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_833f8c75-bc89-49ef-8f17-afae9edf1e82" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_17c74462-041d-46bf-b7b0-949b1cf590e1" xlink:to="loc_us-gaap_RetirementPlanNameDomain_833f8c75-bc89-49ef-8f17-afae9edf1e82" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#PensionAndOtherPostRetirementBenefitsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsNarrativeDetails" xlink:type="extended" id="i6e5dbfc5dcf44c1a9a088b553e050ea9_PensionAndOtherPostRetirementBenefitsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_fc827636-4075-49a1-89a3-770cdf1e1e8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_fc827636-4075-49a1-89a3-770cdf1e1e8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_a229af28-6087-467e-aeb0-19e9c6c8b17f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_a229af28-6087-467e-aeb0-19e9c6c8b17f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_DefinedBenefitPlanEstimatedRequiredFutureEmployerContributionsInCurrentFiscalYear_6d75dd95-01cd-4ca2-bf7b-cb17b8dd2a36" xlink:href="tg-20210630.xsd#tg_DefinedBenefitPlanEstimatedRequiredFutureEmployerContributionsInCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_tg_DefinedBenefitPlanEstimatedRequiredFutureEmployerContributionsInCurrentFiscalYear_6d75dd95-01cd-4ca2-bf7b-cb17b8dd2a36" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionContributions_0263ba4a-168a-4dc3-8b21-f0635b569be4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_us-gaap_PensionContributions_0263ba4a-168a-4dc3-8b21-f0635b569be4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_DefinedBenefitPlanEstimatedDiscretionaryFutureEmployerContributionsCurrentFiscalYear_fa2a62b6-4af6-49eb-aca3-1cbb7c6b6551" xlink:href="tg-20210630.xsd#tg_DefinedBenefitPlanEstimatedDiscretionaryFutureEmployerContributionsCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_tg_DefinedBenefitPlanEstimatedDiscretionaryFutureEmployerContributionsCurrentFiscalYear_fa2a62b6-4af6-49eb-aca3-1cbb7c6b6551" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_67483452-6e4b-4808-bb44-8e62c6dd564a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_67483452-6e4b-4808-bb44-8e62c6dd564a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_971270f7-9f50-4170-994d-c9e2564b76cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_971270f7-9f50-4170-994d-c9e2564b76cb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06cc4364-4e0b-4f80-b44a-88cb0c1a0341" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0951e237-5ad4-441b-bdd0-e50efd83edd6" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06cc4364-4e0b-4f80-b44a-88cb0c1a0341" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_870bbc78-9c76-4060-871f-b67bd8de3f8b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06cc4364-4e0b-4f80-b44a-88cb0c1a0341" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_870bbc78-9c76-4060-871f-b67bd8de3f8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_870bbc78-9c76-4060-871f-b67bd8de3f8b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_870bbc78-9c76-4060-871f-b67bd8de3f8b" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_870bbc78-9c76-4060-871f-b67bd8de3f8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_fcad60f3-8a5b-4826-b12f-a64f73159028" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_870bbc78-9c76-4060-871f-b67bd8de3f8b" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_fcad60f3-8a5b-4826-b12f-a64f73159028" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AccruedExpensesMember_c6f7c85b-07c4-49c1-95f1-d920ddca39e6" xlink:href="tg-20210630.xsd#tg_AccruedExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_fcad60f3-8a5b-4826-b12f-a64f73159028" xlink:to="loc_tg_AccruedExpensesMember_c6f7c85b-07c4-49c1-95f1-d920ddca39e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_f1003d78-f542-4923-be24-6a4249b521cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06cc4364-4e0b-4f80-b44a-88cb0c1a0341" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_f1003d78-f542-4923-be24-6a4249b521cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_f1003d78-f542-4923-be24-6a4249b521cc_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_f1003d78-f542-4923-be24-6a4249b521cc" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_f1003d78-f542-4923-be24-6a4249b521cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_7fcd1532-0696-4407-8556-ee17e6c6d91f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_f1003d78-f542-4923-be24-6a4249b521cc" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_7fcd1532-0696-4407-8556-ee17e6c6d91f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_57170d5c-30d2-4526-9e9a-6115a6e03653" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_7fcd1532-0696-4407-8556-ee17e6c6d91f" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_57170d5c-30d2-4526-9e9a-6115a6e03653" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_d45feb7e-88d7-4743-8cc0-270e2a6d0e53" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_7fcd1532-0696-4407-8556-ee17e6c6d91f" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_d45feb7e-88d7-4743-8cc0-270e2a6d0e53" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails" xlink:type="extended" id="ib97d44f888b745459f1e4202df45a999_PensionAndOtherPostRetirementBenefitsScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_2ef365e7-fa28-416d-b247-734321342a64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_2ef365e7-fa28-416d-b247-734321342a64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_94a1dc51-8892-4a3b-9206-a5802c1fb15d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_94a1dc51-8892-4a3b-9206-a5802c1fb15d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_e4c64dec-b74a-4876-b83e-0475c45cb8fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_e4c64dec-b74a-4876-b83e-0475c45cb8fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AmortizationOfPriorServiceCostsAndNetGainsLoss_04a6c659-2a99-4551-ab38-8f7ffe130009" xlink:href="tg-20210630.xsd#tg_AmortizationOfPriorServiceCostsAndNetGainsLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_tg_AmortizationOfPriorServiceCostsAndNetGainsLoss_04a6c659-2a99-4551-ab38-8f7ffe130009" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_6d14396c-a241-4dfe-a12f-616c5e81e635" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_6d14396c-a241-4dfe-a12f-616c5e81e635" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5b32a288-efed-455a-9ebb-afe4d0f8e982" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5b32a288-efed-455a-9ebb-afe4d0f8e982" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2833c968-32dc-4c75-8a54-4279f6b1d7bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_a03793ef-c83b-4e82-bbd4-968b997916db" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2833c968-32dc-4c75-8a54-4279f6b1d7bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_bd6f9b08-c160-4c6e-a193-d53e9c9d62fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2833c968-32dc-4c75-8a54-4279f6b1d7bc" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_bd6f9b08-c160-4c6e-a193-d53e9c9d62fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_bd6f9b08-c160-4c6e-a193-d53e9c9d62fd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_bd6f9b08-c160-4c6e-a193-d53e9c9d62fd" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_bd6f9b08-c160-4c6e-a193-d53e9c9d62fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_fd6f19e6-48b6-4ba7-b9d8-3d886a5a29b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_bd6f9b08-c160-4c6e-a193-d53e9c9d62fd" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_fd6f19e6-48b6-4ba7-b9d8-3d886a5a29b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_70289a52-8eb0-495c-bfd1-ec41f9e1844e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_fd6f19e6-48b6-4ba7-b9d8-3d886a5a29b9" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_70289a52-8eb0-495c-bfd1-ec41f9e1844e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_c6a3f761-8662-4421-8924-3d615546e85a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_fd6f19e6-48b6-4ba7-b9d8-3d886a5a29b9" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_c6a3f761-8662-4421-8924-3d615546e85a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#OtherIncomeExpenseNetOtherIncomeExpenseNetDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/OtherIncomeExpenseNetOtherIncomeExpenseNetDetails" xlink:type="extended" id="i6a34f6373845439eb5e77f555257cab1_OtherIncomeExpenseNetOtherIncomeExpenseNetDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInterestAndDividendIncome_e3344676-d7e9-479a-aa95-fba0c381a1e2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherInterestAndDividendIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_OtherInterestAndDividendIncome_e3344676-d7e9-479a-aa95-fba0c381a1e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_OtherNonoperatingIncomeExpenseNetTotal_3310ac9d-a600-42a7-84d7-7a0c4edc3c46" xlink:href="tg-20210630.xsd#tg_OtherNonoperatingIncomeExpenseNetTotal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_tg_OtherNonoperatingIncomeExpenseNetTotal_3310ac9d-a600-42a7-84d7-7a0c4edc3c46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeDividend_0f136d3b-81f6-41ad-9389-b60c60a80fe0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentIncomeDividend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_InvestmentIncomeDividend_0f136d3b-81f6-41ad-9389-b60c60a80fe0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_UnrealizedGainLossonInvestmentskaleo_d74390d2-81dc-4949-a904-748f0a9e575a" xlink:href="tg-20210630.xsd#tg_UnrealizedGainLossonInvestmentskaleo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_tg_UnrealizedGainLossonInvestmentskaleo_d74390d2-81dc-4949-a904-748f0a9e575a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_983fc74a-d923-4914-bece-79aa1fdc0ee8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_983fc74a-d923-4914-bece-79aa1fdc0ee8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonrecurringExpense_29e7ff2b-f775-42d7-8a74-4df135f1712c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonrecurringExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_OtherNonrecurringExpense_29e7ff2b-f775-42d7-8a74-4df135f1712c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_OtherNonoperatingIncomeExpenseNetOther_f986b093-6c8c-4af6-b5ff-4284f0c78bdb" xlink:href="tg-20210630.xsd#tg_OtherNonoperatingIncomeExpenseNetOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_tg_OtherNonoperatingIncomeExpenseNetOther_f986b093-6c8c-4af6-b5ff-4284f0c78bdb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingExpense_055c13a4-9553-467d-ad44-7d73304cc738" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_OtherNonoperatingExpense_055c13a4-9553-467d-ad44-7d73304cc738" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_4d91f61b-030e-4a70-b7f2-56e928cf2318" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_GainLossOnInvestments_4d91f61b-030e-4a70-b7f2-56e928cf2318" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_8680a20b-2ac9-4fe5-9cd2-e16e2df17a2e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_8680a20b-2ac9-4fe5-9cd2-e16e2df17a2e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_26027a32-6138-47d5-96be-c9c37b108fea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_4b75986a-7fde-48da-b090-c447be34b5aa" xlink:to="loc_us-gaap_StatementTable_26027a32-6138-47d5-96be-c9c37b108fea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_4918b081-eedc-4e5b-bb53-6b41fb4f587c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_26027a32-6138-47d5-96be-c9c37b108fea" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_4918b081-eedc-4e5b-bb53-6b41fb4f587c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_4918b081-eedc-4e5b-bb53-6b41fb4f587c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_4918b081-eedc-4e5b-bb53-6b41fb4f587c" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_4918b081-eedc-4e5b-bb53-6b41fb4f587c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_8b4819ed-bda3-4f23-9758-8824629a6f8c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_4918b081-eedc-4e5b-bb53-6b41fb4f587c" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_8b4819ed-bda3-4f23-9758-8824629a6f8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_e399a234-6c11-419e-9211-45abff71d0ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_8b4819ed-bda3-4f23-9758-8824629a6f8c" xlink:to="loc_us-gaap_OtherRestructuringMember_e399a234-6c11-419e-9211-45abff71d0ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityByLocationAxis_d2283688-1aed-49cc-b952-e66da1c7bf27" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityByLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_26027a32-6138-47d5-96be-c9c37b108fea" xlink:to="loc_dei_EntityByLocationAxis_d2283688-1aed-49cc-b952-e66da1c7bf27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocationDomain_d2283688-1aed-49cc-b952-e66da1c7bf27_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityByLocationAxis_d2283688-1aed-49cc-b952-e66da1c7bf27" xlink:to="loc_dei_LocationDomain_d2283688-1aed-49cc-b952-e66da1c7bf27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocationDomain_94b1a625-f497-4f42-bf17-a91424646df0" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityByLocationAxis_d2283688-1aed-49cc-b952-e66da1c7bf27" xlink:to="loc_dei_LocationDomain_94b1a625-f497-4f42-bf17-a91424646df0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmProductsManufacturingFacilityInShanghaiChinaMember_dad4256a-654b-42ef-b8a4-18928771ed46" xlink:href="tg-20210630.xsd#tg_FilmProductsManufacturingFacilityInShanghaiChinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_LocationDomain_94b1a625-f497-4f42-bf17-a91424646df0" xlink:to="loc_tg_FilmProductsManufacturingFacilityInShanghaiChinaMember_dad4256a-654b-42ef-b8a4-18928771ed46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_45743735-5387-4122-b1cd-7dc9731169cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_26027a32-6138-47d5-96be-c9c37b108fea" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_45743735-5387-4122-b1cd-7dc9731169cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_45743735-5387-4122-b1cd-7dc9731169cb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_45743735-5387-4122-b1cd-7dc9731169cb" xlink:to="loc_us-gaap_SegmentDomain_45743735-5387-4122-b1cd-7dc9731169cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_85cb363e-e8e4-40d8-887d-b42a493b3221" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_45743735-5387-4122-b1cd-7dc9731169cb" xlink:to="loc_us-gaap_SegmentDomain_85cb363e-e8e4-40d8-887d-b42a493b3221" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMember_8c004769-eb24-47ff-8418-8210fab28c2d" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_85cb363e-e8e4-40d8-887d-b42a493b3221" xlink:to="loc_tg_FlexiblePackagingFilmsMember_8c004769-eb24-47ff-8418-8210fab28c2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PEFilmsMember_388b864b-3f4b-4b3f-89a6-698a2fd55715" xlink:href="tg-20210630.xsd#tg_PEFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_85cb363e-e8e4-40d8-887d-b42a493b3221" xlink:to="loc_tg_PEFilmsMember_388b864b-3f4b-4b3f-89a6-698a2fd55715" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_24fa8a97-5b22-48a7-9673-d7272e1217fe" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_26027a32-6138-47d5-96be-c9c37b108fea" xlink:to="loc_dei_LegalEntityAxis_24fa8a97-5b22-48a7-9673-d7272e1217fe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_24fa8a97-5b22-48a7-9673-d7272e1217fe_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_24fa8a97-5b22-48a7-9673-d7272e1217fe" xlink:to="loc_dei_EntityDomain_24fa8a97-5b22-48a7-9673-d7272e1217fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3de3e319-f224-46d5-ac8c-0e94d26c311f" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_24fa8a97-5b22-48a7-9673-d7272e1217fe" xlink:to="loc_dei_EntityDomain_3de3e319-f224-46d5-ac8c-0e94d26c311f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_KaleoMember_902d8fd8-3c56-4069-8711-3e613af054ea" xlink:href="tg-20210630.xsd#tg_KaleoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3de3e319-f224-46d5-ac8c-0e94d26c311f" xlink:to="loc_tg_KaleoMember_902d8fd8-3c56-4069-8711-3e613af054ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_HarbingerCapitalPartnersSpecialSituationsFundMember_879933f8-5c89-4273-8494-967ce41ec918" xlink:href="tg-20210630.xsd#tg_HarbingerCapitalPartnersSpecialSituationsFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3de3e319-f224-46d5-ac8c-0e94d26c311f" xlink:to="loc_tg_HarbingerCapitalPartnersSpecialSituationsFundMember_879933f8-5c89-4273-8494-967ce41ec918" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails" xlink:type="extended" id="i12d7dcfbff644a369bcd6edf0f0843f9_SegmentReportingScheduleOfSegmentReportingInformationBySegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_NetSales_1ebee180-54fd-4aae-a183-79a0c09c7b8a" xlink:href="tg-20210630.xsd#tg_NetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_NetSales_1ebee180-54fd-4aae-a183-79a0c09c7b8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_GrossSales_9179c6f2-acd6-4a29-a570-a01e93d93944" xlink:href="tg-20210630.xsd#tg_GrossSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_GrossSales_9179c6f2-acd6-4a29-a570-a01e93d93944" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_3e58ed34-896b-447a-a6d3-c29d28958a40" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_3e58ed34-896b-447a-a6d3-c29d28958a40" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_BrazilOneTimeTaxCreditPISCOFINS_a06df6b3-3cff-40c6-8883-ea90f0fef98e" xlink:href="tg-20210630.xsd#tg_BrazilOneTimeTaxCreditPISCOFINS"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_BrazilOneTimeTaxCreditPISCOFINS_a06df6b3-3cff-40c6-8883-ea90f0fef98e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeLossFromOngoingOperations_c7029dc9-ce2e-4387-887e-3da288e72f78" xlink:href="tg-20210630.xsd#tg_IncomeLossFromOngoingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_IncomeLossFromOngoingOperations_c7029dc9-ce2e-4387-887e-3da288e72f78" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PlantShutdownsAssetImpairmentsRestructuringAndOther_f3b9f7ba-8b9a-42ef-b17d-2b72e3b3f639" xlink:href="tg-20210630.xsd#tg_PlantShutdownsAssetImpairmentsRestructuringAndOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_PlantShutdownsAssetImpairmentsRestructuringAndOther_f3b9f7ba-8b9a-42ef-b17d-2b72e3b3f639" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AcceleratedDepreciationExpense_dc48f9da-90e8-42ef-b859-73f8fad0e9c6" xlink:href="tg-20210630.xsd#tg_AcceleratedDepreciationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_AcceleratedDepreciationExpense_dc48f9da-90e8-42ef-b859-73f8fad0e9c6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_c7e61387-f646-40e6-9c67-93693dae3bd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_c7e61387-f646-40e6-9c67-93693dae3bd4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_58993760-b10d-44a6-8bd2-bcdf236e03ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_58993760-b10d-44a6-8bd2-bcdf236e03ba" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLossNetOfTax_861c9566-4aaa-43e3-ae2b-2c04b676d308" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_GoodwillImpairmentLossNetOfTax_861c9566-4aaa-43e3-ae2b-2c04b676d308" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TotalIncomeLossAssociatedWithSegments_8d843173-9289-4c4e-9682-94ea9f37b628" xlink:href="tg-20210630.xsd#tg_TotalIncomeLossAssociatedWithSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_TotalIncomeLossAssociatedWithSegments_8d843173-9289-4c4e-9682-94ea9f37b628" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_17638882-caf7-42a0-a3a8-a31ce68a78ec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_InvestmentIncomeInterest_17638882-caf7-42a0-a3a8-a31ce68a78ec" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_19b73fdb-c79b-4889-996b-c19b132cfbbb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_InterestAndDebtExpense_19b73fdb-c79b-4889-996b-c19b132cfbbb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_61f9ffb0-054f-47f8-aa53-90a38e2147ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_61f9ffb0-054f-47f8-aa53-90a38e2147ad" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_0661cf4e-4a6e-4bd7-8eff-b3e9540f5e7d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_0661cf4e-4a6e-4bd7-8eff-b3e9540f5e7d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment_b882092e-0103-4180-b43e-85ad5462e78b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_CostmethodInvestmentsOtherThanTemporaryImpairment_b882092e-0103-4180-b43e-85ad5462e78b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockOptionPlanExpense_05b3d885-e676-47eb-9b0b-8f1084ae9ab4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockOptionPlanExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_StockOptionPlanExpense_05b3d885-e676-47eb-9b0b-8f1084ae9ab4" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CorporateExpensesNet_99ad7218-2e79-4e89-8b44-fe40f2c2b876" xlink:href="tg-20210630.xsd#tg_CorporateExpensesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_CorporateExpensesNet_99ad7218-2e79-4e89-8b44-fe40f2c2b876" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_0a54c03f-9c6c-4a32-b2a7-824b09aff0cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_0a54c03f-9c6c-4a32-b2a7-824b09aff0cb" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8f747676-379d-43d6-8bae-a0eede5c4e9b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8f747676-379d-43d6-8bae-a0eede5c4e9b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_3a96cdf8-6976-4ee3-b447-f052cc5cb0b7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_3a96cdf8-6976-4ee3-b447-f052cc5cb0b7" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_4fb5362b-1340-4038-a1a6-6a831fa7e117" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_4fb5362b-1340-4038-a1a6-6a831fa7e117" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_72ac0fe3-0bcc-435a-a769-e95cc9655b74" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_NetIncomeLoss_72ac0fe3-0bcc-435a-a769-e95cc9655b74" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EarningsBeforeInterestTaxesDepreciationAndAmortizationEBITDA_0cec3b8a-6ade-4b93-b6d8-c4ac7de4730f" xlink:href="tg-20210630.xsd#tg_EarningsBeforeInterestTaxesDepreciationAndAmortizationEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_EarningsBeforeInterestTaxesDepreciationAndAmortizationEBITDA_0cec3b8a-6ade-4b93-b6d8-c4ac7de4730f" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_8da5938f-63cf-473d-a72a-62a16b6c3587" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_8da5938f-63cf-473d-a72a-62a16b6c3587" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EarningsBeforeInterestAndTaxesEBIT_c796126c-42ab-49da-82ab-02bf840dc91c" xlink:href="tg-20210630.xsd#tg_EarningsBeforeInterestAndTaxesEBIT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_tg_EarningsBeforeInterestAndTaxesEBIT_c796126c-42ab-49da-82ab-02bf840dc91c" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_562d7a83-a183-4b23-a5d1-6236a685335a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_562d7a83-a183-4b23-a5d1-6236a685335a" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_54a44056-ffae-4baa-9271-b944902bebab" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsAxis_760bb51f-6f51-43a1-a1e6-ad8d69446c6a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsAxis_760bb51f-6f51-43a1-a1e6-ad8d69446c6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsDomain_760bb51f-6f51-43a1-a1e6-ad8d69446c6a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsAxis_760bb51f-6f51-43a1-a1e6-ad8d69446c6a" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsDomain_760bb51f-6f51-43a1-a1e6-ad8d69446c6a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsDomain_29eec609-0482-4515-b7e1-200d29cc0bf5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsAxis_760bb51f-6f51-43a1-a1e6-ad8d69446c6a" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsDomain_29eec609-0482-4515-b7e1-200d29cc0bf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_8bbf93c1-86c8-4105-91ac-b9b08a290a39" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsDomain_29eec609-0482-4515-b7e1-200d29cc0bf5" xlink:to="loc_us-gaap_SalesMember_8bbf93c1-86c8-4105-91ac-b9b08a290a39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_0945d54b-e0b3-4398-b282-e649f1e46d28" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsDomain_29eec609-0482-4515-b7e1-200d29cc0bf5" xlink:to="loc_us-gaap_SalesRevenueNetMember_0945d54b-e0b3-4398-b282-e649f1e46d28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_81681da6-b22c-4885-bb94-d76aaec002b6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:to="loc_srt_ProductOrServiceAxis_81681da6-b22c-4885-bb94-d76aaec002b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_81681da6-b22c-4885-bb94-d76aaec002b6_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_81681da6-b22c-4885-bb94-d76aaec002b6" xlink:to="loc_srt_ProductsAndServicesDomain_81681da6-b22c-4885-bb94-d76aaec002b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_81681da6-b22c-4885-bb94-d76aaec002b6" xlink:to="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShippingAndHandlingMember_abbeb79e-34ce-4059-91eb-939aff9e77aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShippingAndHandlingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_us-gaap_ShippingAndHandlingMember_abbeb79e-34ce-4059-91eb-939aff9e77aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PersonalCareMaterialsMember_792f4b1f-8599-404c-8afa-b64e38515170" xlink:href="tg-20210630.xsd#tg_PersonalCareMaterialsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_PersonalCareMaterialsMember_792f4b1f-8599-404c-8afa-b64e38515170" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_SurfaceProtectionFilmsMember_0c03309e-3675-4cdf-8ba4-4931b3a450e5" xlink:href="tg-20210630.xsd#tg_SurfaceProtectionFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_SurfaceProtectionFilmsMember_0c03309e-3675-4cdf-8ba4-4931b3a450e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmsForOtherMarketsMember_e4c11e6e-6560-4099-b48a-f37cd62c2476" xlink:href="tg-20210630.xsd#tg_FilmsForOtherMarketsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_FilmsForOtherMarketsMember_e4c11e6e-6560-4099-b48a-f37cd62c2476" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmProductsSubtotalMember_878b81f0-7cf0-44bc-a3dc-80c323328e87" xlink:href="tg-20210630.xsd#tg_FilmProductsSubtotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_FilmProductsSubtotalMember_878b81f0-7cf0-44bc-a3dc-80c323328e87" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_NonresidentialBuildingAndConstructionMember_d1f3b8ad-02e9-41df-b48a-6cb1bec95633" xlink:href="tg-20210630.xsd#tg_NonresidentialBuildingAndConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_NonresidentialBuildingAndConstructionMember_d1f3b8ad-02e9-41df-b48a-6cb1bec95633" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ConsumerDurablesMember_3fba7d09-8a44-4096-a592-868108bc417f" xlink:href="tg-20210630.xsd#tg_ConsumerDurablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_ConsumerDurablesMember_3fba7d09-8a44-4096-a592-868108bc417f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_DistributionMember_67aa7208-2181-476a-8c2a-9fe2b8b513b3" xlink:href="tg-20210630.xsd#tg_DistributionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_DistributionMember_67aa7208-2181-476a-8c2a-9fe2b8b513b3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AutomotiveMember_35eab466-9abc-46f0-a47e-2b85517e3d60" xlink:href="tg-20210630.xsd#tg_AutomotiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_AutomotiveMember_35eab466-9abc-46f0-a47e-2b85517e3d60" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ResidentialBuildingAndConstructionMember_2bebc9ee-a4a3-4dab-a906-45049fe3f22b" xlink:href="tg-20210630.xsd#tg_ResidentialBuildingAndConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_ResidentialBuildingAndConstructionMember_2bebc9ee-a4a3-4dab-a906-45049fe3f22b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_MachineryandEquipmentBNLDomain_270c593b-5bf2-4da1-b212-f7b0d22f4ac3" xlink:href="tg-20210630.xsd#tg_MachineryandEquipmentBNLDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_MachineryandEquipmentBNLDomain_270c593b-5bf2-4da1-b212-f7b0d22f4ac3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ElectricalMember_47468ef4-36a4-4e24-99cf-c53160762fab" xlink:href="tg-20210630.xsd#tg_ElectricalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_ElectricalMember_47468ef4-36a4-4e24-99cf-c53160762fab" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsSubtotalMember_56ea346e-73c2-45d3-ad73-d315476814e7" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsSubtotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_tg_AluminumExtrusionsSubtotalMember_56ea346e-73c2-45d3-ad73-d315476814e7" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_a176468f-1f76-406e-bc1f-39b4750fa219" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3d0fc392-9897-4e58-ae39-ad06cf778810" xlink:to="loc_us-gaap_ProductMember_a176468f-1f76-406e-bc1f-39b4750fa219" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityByLocationAxis_caa24e9a-6085-452b-a824-4704359d20c1" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityByLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:to="loc_dei_EntityByLocationAxis_caa24e9a-6085-452b-a824-4704359d20c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocationDomain_caa24e9a-6085-452b-a824-4704359d20c1_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityByLocationAxis_caa24e9a-6085-452b-a824-4704359d20c1" xlink:to="loc_dei_LocationDomain_caa24e9a-6085-452b-a824-4704359d20c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocationDomain_81f9d30c-5ca8-426f-bff5-a7a8dd8537a8" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityByLocationAxis_caa24e9a-6085-452b-a824-4704359d20c1" xlink:to="loc_dei_LocationDomain_81f9d30c-5ca8-426f-bff5-a7a8dd8537a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AlleghanyandBathCountyVirginiaMember_85546feb-8e2c-42fc-ad92-4eb3cf372bc8" xlink:href="tg-20210630.xsd#tg_AlleghanyandBathCountyVirginiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_LocationDomain_81f9d30c-5ca8-426f-bff5-a7a8dd8537a8" xlink:to="loc_tg_AlleghanyandBathCountyVirginiaMember_85546feb-8e2c-42fc-ad92-4eb3cf372bc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_a2870089-591f-4ef4-a6c8-848fb013f89e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_a2870089-591f-4ef4-a6c8-848fb013f89e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a2870089-591f-4ef4-a6c8-848fb013f89e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a2870089-591f-4ef4-a6c8-848fb013f89e" xlink:to="loc_us-gaap_SegmentDomain_a2870089-591f-4ef4-a6c8-848fb013f89e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_89ca9357-e94e-4b93-a1aa-94933402edd7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a2870089-591f-4ef4-a6c8-848fb013f89e" xlink:to="loc_us-gaap_SegmentDomain_89ca9357-e94e-4b93-a1aa-94933402edd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PEFilmsMember_70191288-2a55-4d57-ae89-fc837fcc51da" xlink:href="tg-20210630.xsd#tg_PEFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_89ca9357-e94e-4b93-a1aa-94933402edd7" xlink:to="loc_tg_PEFilmsMember_70191288-2a55-4d57-ae89-fc837fcc51da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMemberDomain_146db5c6-0b22-4e7d-9ab6-c2ba45dab16c" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMemberDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_89ca9357-e94e-4b93-a1aa-94933402edd7" xlink:to="loc_tg_FlexiblePackagingFilmsMemberDomain_146db5c6-0b22-4e7d-9ab6-c2ba45dab16c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsMember_19497dbd-fc8e-412b-9aff-f5e5575afec7" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_89ca9357-e94e-4b93-a1aa-94933402edd7" xlink:to="loc_tg_AluminumExtrusionsMember_19497dbd-fc8e-412b-9aff-f5e5575afec7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMember_66878cf6-3da4-4f23-bf20-70c6dcf18b80" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_89ca9357-e94e-4b93-a1aa-94933402edd7" xlink:to="loc_tg_FlexiblePackagingFilmsMember_66878cf6-3da4-4f23-bf20-70c6dcf18b80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ef9cbf05-7d9e-401c-9b5d-07478f758380" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_2b94d0f3-c7ce-41b2-974a-457ab13869c5" xlink:to="loc_dei_LegalEntityAxis_ef9cbf05-7d9e-401c-9b5d-07478f758380" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ef9cbf05-7d9e-401c-9b5d-07478f758380_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ef9cbf05-7d9e-401c-9b5d-07478f758380" xlink:to="loc_dei_EntityDomain_ef9cbf05-7d9e-401c-9b5d-07478f758380_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_13ef8fa1-ecb3-4fcf-864f-08dbd35d855d" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ef9cbf05-7d9e-401c-9b5d-07478f758380" xlink:to="loc_dei_EntityDomain_13ef8fa1-ecb3-4fcf-864f-08dbd35d855d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_KaleoMember_054b9fe3-b0bd-4bc2-9940-a12719c4447a" xlink:href="tg-20210630.xsd#tg_KaleoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_13ef8fa1-ecb3-4fcf-864f-08dbd35d855d" xlink:to="loc_tg_KaleoMember_054b9fe3-b0bd-4bc2-9940-a12719c4447a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails" xlink:type="extended" id="i367fd42ed5d34432b456ef739709f4bf_SegmentReportingScheduleOfIdentifiableAssetsBySegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IdentifiableAssetsBySegmentSubtotal_741c656d-ce34-48e9-9dc8-aea438060527" xlink:href="tg-20210630.xsd#tg_IdentifiableAssetsBySegmentSubtotal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:to="loc_tg_IdentifiableAssetsBySegmentSubtotal_741c656d-ce34-48e9-9dc8-aea438060527" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_GeneralCorporateAssets_48b19901-3401-4e95-b737-54cb5366b4ce" xlink:href="tg-20210630.xsd#tg_GeneralCorporateAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:to="loc_tg_GeneralCorporateAssets_48b19901-3401-4e95-b737-54cb5366b4ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_705e3af0-ff33-4862-bf68-b9fbbc95c4d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_705e3af0-ff33-4862-bf68-b9fbbc95c4d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_034eeb95-2111-4d7b-a09e-423d6eaad0b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_034eeb95-2111-4d7b-a09e-423d6eaad0b3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_c2a2e05d-e0be-46c3-9ac8-b0f51348b082" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:to="loc_us-gaap_Assets_c2a2e05d-e0be-46c3-9ac8-b0f51348b082" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_09b22843-6e1f-4353-af08-53a0ac3c3035" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_975fd3fd-00b3-49e7-b0f5-56fd4bc8485e" xlink:to="loc_us-gaap_StatementTable_09b22843-6e1f-4353-af08-53a0ac3c3035" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_e609d6e6-b33d-451b-95b9-e334d0a746a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_09b22843-6e1f-4353-af08-53a0ac3c3035" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_e609d6e6-b33d-451b-95b9-e334d0a746a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e609d6e6-b33d-451b-95b9-e334d0a746a2_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e609d6e6-b33d-451b-95b9-e334d0a746a2" xlink:to="loc_us-gaap_SegmentDomain_e609d6e6-b33d-451b-95b9-e334d0a746a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c418b4a5-3ef4-4474-acce-450fb8488aad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e609d6e6-b33d-451b-95b9-e334d0a746a2" xlink:to="loc_us-gaap_SegmentDomain_c418b4a5-3ef4-4474-acce-450fb8488aad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PEFilmsMember_2121dac4-1cc6-4b4e-8b7d-5f0590aca524" xlink:href="tg-20210630.xsd#tg_PEFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c418b4a5-3ef4-4474-acce-450fb8488aad" xlink:to="loc_tg_PEFilmsMember_2121dac4-1cc6-4b4e-8b7d-5f0590aca524" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMemberDomain_fd1589c3-a759-438f-a03f-0e6a31560105" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMemberDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c418b4a5-3ef4-4474-acce-450fb8488aad" xlink:to="loc_tg_FlexiblePackagingFilmsMemberDomain_fd1589c3-a759-438f-a03f-0e6a31560105" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsMember_98d55803-2220-46a6-8d60-36b7f58eb00d" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c418b4a5-3ef4-4474-acce-450fb8488aad" xlink:to="loc_tg_AluminumExtrusionsMember_98d55803-2220-46a6-8d60-36b7f58eb00d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#SegmentReportingScheduleofRevenuebyGeographicLocationDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/SegmentReportingScheduleofRevenuebyGeographicLocationDetails" xlink:type="extended" id="i48514095527144348a1d5f8158f584fe_SegmentReportingScheduleofRevenuebyGeographicLocationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_2ed85919-e45a-4e45-aede-a1da1b01d52e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_d927058a-bf6d-4c4c-85ab-6ecc48a37bb2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2ed85919-e45a-4e45-aede-a1da1b01d52e" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_d927058a-bf6d-4c4c-85ab-6ecc48a37bb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_NetSales_5bdc9472-72c2-4511-bdd4-0799a7d31e56" xlink:href="tg-20210630.xsd#tg_NetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2ed85919-e45a-4e45-aede-a1da1b01d52e" xlink:to="loc_tg_NetSales_5bdc9472-72c2-4511-bdd4-0799a7d31e56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_75010660-86ae-4f55-8d1b-cce5d998374e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2ed85919-e45a-4e45-aede-a1da1b01d52e" xlink:to="loc_us-gaap_Revenues_75010660-86ae-4f55-8d1b-cce5d998374e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2ed85919-e45a-4e45-aede-a1da1b01d52e" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsAxis_f696bff8-355e-4c52-895b-18684d0e50f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsAxis_f696bff8-355e-4c52-895b-18684d0e50f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsDomain_f696bff8-355e-4c52-895b-18684d0e50f1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsAxis_f696bff8-355e-4c52-895b-18684d0e50f1" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsDomain_f696bff8-355e-4c52-895b-18684d0e50f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsConsolidationItemsDomain_030aa40a-6837-4423-a022-2f967b538509" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsAxis_f696bff8-355e-4c52-895b-18684d0e50f1" xlink:to="loc_us-gaap_SubsegmentsConsolidationItemsDomain_030aa40a-6837-4423-a022-2f967b538509" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetAssetsGeographicAreaMember_7abfd357-db12-48d0-a568-8c99e5fd93bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetAssetsGeographicAreaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsConsolidationItemsDomain_030aa40a-6837-4423-a022-2f967b538509" xlink:to="loc_us-gaap_NetAssetsGeographicAreaMember_7abfd357-db12-48d0-a568-8c99e5fd93bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_fa084457-a65e-491a-8989-3fa684530410" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_fa084457-a65e-491a-8989-3fa684530410" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_fa084457-a65e-491a-8989-3fa684530410_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_fa084457-a65e-491a-8989-3fa684530410" xlink:to="loc_us-gaap_SegmentDomain_fa084457-a65e-491a-8989-3fa684530410_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_fa084457-a65e-491a-8989-3fa684530410" xlink:to="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PEFilmsMember_cba4c256-258a-4df5-9169-fb5deabe1b2b" xlink:href="tg-20210630.xsd#tg_PEFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:to="loc_tg_PEFilmsMember_cba4c256-258a-4df5-9169-fb5deabe1b2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMemberDomain_5a10e2a0-a532-42a5-ad9a-809d435be03d" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMemberDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:to="loc_tg_FlexiblePackagingFilmsMemberDomain_5a10e2a0-a532-42a5-ad9a-809d435be03d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsMember_e22f9bb7-fab0-4b26-bb56-b768f298cb07" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:to="loc_tg_AluminumExtrusionsMember_e22f9bb7-fab0-4b26-bb56-b768f298cb07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ExportsFromUnitedStatesMember_56f5610c-472d-410d-a5ff-6ec57a10ff74" xlink:href="tg-20210630.xsd#tg_ExportsFromUnitedStatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:to="loc_tg_ExportsFromUnitedStatesMember_56f5610c-472d-410d-a5ff-6ec57a10ff74" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_OperationsOutsideUnitedStatesMember_43828beb-91e8-439d-b6ee-2cfc484de0a0" xlink:href="tg-20210630.xsd#tg_OperationsOutsideUnitedStatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_894e23ab-4179-4dff-9382-1b3df72dd39d" xlink:to="loc_tg_OperationsOutsideUnitedStatesMember_43828beb-91e8-439d-b6ee-2cfc484de0a0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_6277480c-4f20-4780-ba04-ed16fe9120dd" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_srt_ProductOrServiceAxis_6277480c-4f20-4780-ba04-ed16fe9120dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6277480c-4f20-4780-ba04-ed16fe9120dd_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_6277480c-4f20-4780-ba04-ed16fe9120dd" xlink:to="loc_srt_ProductsAndServicesDomain_6277480c-4f20-4780-ba04-ed16fe9120dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_6277480c-4f20-4780-ba04-ed16fe9120dd" xlink:to="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_PersonalCareMaterialsMember_77d3ef5b-2ac0-4779-9683-d41671fd48ed" xlink:href="tg-20210630.xsd#tg_PersonalCareMaterialsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_PersonalCareMaterialsMember_77d3ef5b-2ac0-4779-9683-d41671fd48ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_SurfaceProtectionFilmsMember_b31d138c-90d6-4d54-8132-e41e0901fc00" xlink:href="tg-20210630.xsd#tg_SurfaceProtectionFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_SurfaceProtectionFilmsMember_b31d138c-90d6-4d54-8132-e41e0901fc00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmsForOtherMarketsMember_e13d4ccb-3de5-4198-a021-4ddef35e8cdb" xlink:href="tg-20210630.xsd#tg_FilmsForOtherMarketsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_FilmsForOtherMarketsMember_e13d4ccb-3de5-4198-a021-4ddef35e8cdb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FilmProductsSubtotalMember_38160158-0046-4ed2-86f6-a72ec7cdf02d" xlink:href="tg-20210630.xsd#tg_FilmProductsSubtotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_FilmProductsSubtotalMember_38160158-0046-4ed2-86f6-a72ec7cdf02d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_NonresidentialBuildingAndConstructionMember_ce0938eb-aff1-4503-ba5e-5f3e5f92e4c7" xlink:href="tg-20210630.xsd#tg_NonresidentialBuildingAndConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_NonresidentialBuildingAndConstructionMember_ce0938eb-aff1-4503-ba5e-5f3e5f92e4c7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ConsumerDurablesMember_f8c952fe-9ef2-40ec-aa04-67b54c279901" xlink:href="tg-20210630.xsd#tg_ConsumerDurablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_ConsumerDurablesMember_f8c952fe-9ef2-40ec-aa04-67b54c279901" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_DistributionMember_3c61f375-7462-4350-a61b-6d6aa6a65d4b" xlink:href="tg-20210630.xsd#tg_DistributionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_DistributionMember_3c61f375-7462-4350-a61b-6d6aa6a65d4b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AutomotiveMember_02f07e72-98a4-41c2-a660-530dc1355e3b" xlink:href="tg-20210630.xsd#tg_AutomotiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_AutomotiveMember_02f07e72-98a4-41c2-a660-530dc1355e3b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ResidentialBuildingAndConstructionMember_f090f8cc-d293-4787-89e9-39f5374347b2" xlink:href="tg-20210630.xsd#tg_ResidentialBuildingAndConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_ResidentialBuildingAndConstructionMember_f090f8cc-d293-4787-89e9-39f5374347b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_AluminumExtrusionsSubtotalMember_8a4d44c3-f80d-4582-a9a3-743326797748" xlink:href="tg-20210630.xsd#tg_AluminumExtrusionsSubtotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_AluminumExtrusionsSubtotalMember_8a4d44c3-f80d-4582-a9a3-743326797748" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_MachineryandEquipmentBNLDomain_17f2a5e3-a360-48b5-a0c7-0659977d5cc8" xlink:href="tg-20210630.xsd#tg_MachineryandEquipmentBNLDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_MachineryandEquipmentBNLDomain_17f2a5e3-a360-48b5-a0c7-0659977d5cc8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ElectricalMember_28a97a65-4d41-4b56-9877-3ae523e18d6f" xlink:href="tg-20210630.xsd#tg_ElectricalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6210ba04-6e8a-4c76-892c-3c2d5f8b2ee3" xlink:to="loc_tg_ElectricalMember_28a97a65-4d41-4b56-9877-3ae523e18d6f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_ba8e12e0-e11d-4f0a-aa31-313c187aa6c9" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_srt_StatementGeographicalAxis_ba8e12e0-e11d-4f0a-aa31-313c187aa6c9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ba8e12e0-e11d-4f0a-aa31-313c187aa6c9_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_ba8e12e0-e11d-4f0a-aa31-313c187aa6c9" xlink:to="loc_srt_SegmentGeographicalDomain_ba8e12e0-e11d-4f0a-aa31-313c187aa6c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_ba8e12e0-e11d-4f0a-aa31-313c187aa6c9" xlink:to="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_d2a872e6-f630-49b9-8336-8d6802537e00" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_US_d2a872e6-f630-49b9-8336-8d6802537e00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AsiaMember_a72e0aa6-e1a3-4d5e-a375-c145626472ac" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_AsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_srt_AsiaMember_a72e0aa6-e1a3-4d5e-a375-c145626472ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_e71a2bc8-9f78-4e47-a79b-5af8fed4d0e4" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_CA_e71a2bc8-9f78-4e47-a79b-5af8fed4d0e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_a4fcbf83-acf8-4daa-b6a7-08041bc028af" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_srt_EuropeMember_a4fcbf83-acf8-4daa-b6a7-08041bc028af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LatinAmericaMember_d9e64b21-a465-4798-938c-e36b54dc7aa1" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_LatinAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_srt_LatinAmericaMember_d9e64b21-a465-4798-938c-e36b54dc7aa1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BR_4d06c98c-f3a0-4694-9a40-d4e82403097b" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_BR_4d06c98c-f3a0-4694-9a40-d4e82403097b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NL_387be653-4833-4805-8159-3fe60022d2f8" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_NL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_NL_387be653-4833-4805-8159-3fe60022d2f8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_HU_d5c251c5-fdb6-4c65-b977-273842e73b76" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_HU"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_HU_d5c251c5-fdb6-4c65-b977-273842e73b76" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_7780d148-0c14-4c3d-bf86-838c24077b11" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_CN_7780d148-0c14-4c3d-bf86-838c24077b11" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IN_cc295fcc-9569-4f9c-8bc7-49a5929c8863" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_IN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_IN_cc295fcc-9569-4f9c-8bc7-49a5929c8863" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetAssetsGeographicAreaMember_9e537218-5c41-4df1-810c-55ea658a047b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetAssetsGeographicAreaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_us-gaap_NetAssetsGeographicAreaMember_9e537218-5c41-4df1-810c-55ea658a047b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_AllCountriesDomain_8c93001c-276a-4399-886e-b4cda69779b7" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_AllCountriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_6d2b0427-45bd-4c42-8973-f990ef158ab6" xlink:to="loc_country_AllCountriesDomain_8c93001c-276a-4399-886e-b4cda69779b7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_3723c284-eb4b-41b0-8a03-0234130e8302" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_3723c284-eb4b-41b0-8a03-0234130e8302" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_3723c284-eb4b-41b0-8a03-0234130e8302_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_3723c284-eb4b-41b0-8a03-0234130e8302" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_3723c284-eb4b-41b0-8a03-0234130e8302_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_7f8bca3f-8da4-43a6-ba5b-668fcf2b024b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_3723c284-eb4b-41b0-8a03-0234130e8302" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_7f8bca3f-8da4-43a6-ba5b-668fcf2b024b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationAxis_64ce53f1-b930-49f3-8660-92af1e158cc4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerDurationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_us-gaap_ContractWithCustomerDurationAxis_64ce53f1-b930-49f3-8660-92af1e158cc4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_64ce53f1-b930-49f3-8660-92af1e158cc4_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_64ce53f1-b930-49f3-8660-92af1e158cc4" xlink:to="loc_us-gaap_ContractWithCustomerDurationDomain_64ce53f1-b930-49f3-8660-92af1e158cc4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_795e91aa-7e9f-4183-8ac7-056056567172" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_64ce53f1-b930-49f3-8660-92af1e158cc4" xlink:to="loc_us-gaap_ContractWithCustomerDurationDomain_795e91aa-7e9f-4183-8ac7-056056567172" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_c73e5198-9c75-42f9-96a7-1bc505ec3a74" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_c73e5198-9c75-42f9-96a7-1bc505ec3a74" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_c73e5198-9c75-42f9-96a7-1bc505ec3a74_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_c73e5198-9c75-42f9-96a7-1bc505ec3a74" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_c73e5198-9c75-42f9-96a7-1bc505ec3a74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_34c19179-da07-4a12-9e3d-83968c0499e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_c73e5198-9c75-42f9-96a7-1bc505ec3a74" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_34c19179-da07-4a12-9e3d-83968c0499e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_8c3e9e67-d9d4-4b81-aa7d-01511cd047fa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_8c3e9e67-d9d4-4b81-aa7d-01511cd047fa" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_8c3e9e67-d9d4-4b81-aa7d-01511cd047fa_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_8c3e9e67-d9d4-4b81-aa7d-01511cd047fa" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_8c3e9e67-d9d4-4b81-aa7d-01511cd047fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_6b5e1e27-dfc3-4b3d-87ac-2b40837fd020" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_8c3e9e67-d9d4-4b81-aa7d-01511cd047fa" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_6b5e1e27-dfc3-4b3d-87ac-2b40837fd020" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_e5ec32f2-da8f-4499-b69a-9581fef6c82c" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_969ad03a-5bc3-4210-ab54-2620db893d50" xlink:to="loc_srt_MajorCustomersAxis_e5ec32f2-da8f-4499-b69a-9581fef6c82c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_e5ec32f2-da8f-4499-b69a-9581fef6c82c_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_e5ec32f2-da8f-4499-b69a-9581fef6c82c" xlink:to="loc_srt_NameOfMajorCustomerDomain_e5ec32f2-da8f-4499-b69a-9581fef6c82c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_85b340c5-2b97-4401-8036-f89640546281" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_e5ec32f2-da8f-4499-b69a-9581fef6c82c" xlink:to="loc_srt_NameOfMajorCustomerDomain_85b340c5-2b97-4401-8036-f89640546281" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#IncomeTaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" id="if3fcb29689394c10acc1b6b6d5f86323_IncomeTaxesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:href="tg-20210630.xsd#tg_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncome_cda9495e-29ed-4be9-8d3d-b83ccf8c587e" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncome_cda9495e-29ed-4be9-8d3d-b83ccf8c587e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncomePercentage_d0e101ef-137c-40d5-b368-ee6344d67602" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncomePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationU.S.TaxonForeignBranchIncomePercentage_d0e101ef-137c-40d5-b368-ee6344d67602" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_49d7d5c5-dffb-455c-87bf-432fd25a4463" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_49d7d5c5-dffb-455c-87bf-432fd25a4463" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_b664a76d-0bae-489d-b17a-937a6b9bf16f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_b664a76d-0bae-489d-b17a-937a6b9bf16f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount_34cdad39-1e09-4f82-a167-e3cf7ff05034" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount_34cdad39-1e09-4f82-a167-e3cf7ff05034" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_f6b03e06-ae12-4553-8a38-38cd91c4b192" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_f6b03e06-ae12-4553-8a38-38cd91c4b192" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign_331fe6ab-e926-447b-983f-45c81a261c2b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign_331fe6ab-e926-447b-983f-45c81a261c2b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Effectiveincometaxratereconciliationvaluationallowanceduetoforeignlosses_ce15087c-e377-447a-8b1c-478c8c622292" xlink:href="tg-20210630.xsd#tg_Effectiveincometaxratereconciliationvaluationallowanceduetoforeignlosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_Effectiveincometaxratereconciliationvaluationallowanceduetoforeignlosses_ce15087c-e377-447a-8b1c-478c8c622292" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6eca1266-4bf5-4e92-bedb-3f2a8296703d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_6eca1266-4bf5-4e92-bedb-3f2a8296703d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_ab6ac040-75c0-4a0d-9fb8-b898952aec09" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_ab6ac040-75c0-4a0d-9fb8-b898952aec09" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities_7a06b78e-2075-4b14-b994-57acd3bb7c03" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities_7a06b78e-2075-4b14-b994-57acd3bb7c03" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_Increaseinvalueofkaloinvestmentheldabroad_7f157196-c647-43df-a966-1561724589d5" xlink:href="tg-20210630.xsd#tg_Increaseinvalueofkaloinvestmentheldabroad"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_Increaseinvalueofkaloinvestmentheldabroad_7f157196-c647-43df-a966-1561724589d5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncreaseInValueOfkaloInvestmentHeldAbroadPercentage_8606dd74-2672-4a17-bec8-eb20c403ff37" xlink:href="tg-20210630.xsd#tg_IncreaseInValueOfkaloInvestmentHeldAbroadPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_IncreaseInValueOfkaloInvestmentHeldAbroadPercentage_8606dd74-2672-4a17-bec8-eb20c403ff37" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationAmountFDII_f883cb04-d622-46cb-9cf5-fc79b421d0f3" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationAmountFDII"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationAmountFDII_f883cb04-d622-46cb-9cf5-fc79b421d0f3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCredits_7206c132-7db9-4ed0-8e92-ac55dbd76e61" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCredits_7206c132-7db9-4ed0-8e92-ac55dbd76e61" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_0ea1f4c9-639f-41d3-8a7a-49b8ec468086" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_0ea1f4c9-639f-41d3-8a7a-49b8ec468086" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_cafc5d4e-c6b8-4ea5-97db-2a0abc5c54b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_cafc5d4e-c6b8-4ea5-97db-2a0abc5c54b2" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_f9d0c972-9284-4fcd-9ffd-bab70720ee31" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_f9d0c972-9284-4fcd-9ffd-bab70720ee31" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_9001eafd-f2d6-4d79-ae6a-45a35b08355a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_9001eafd-f2d6-4d79-ae6a-45a35b08355a" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_72991676-dffc-49b7-9326-afbfab5b7d9a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_72991676-dffc-49b7-9326-afbfab5b7d9a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_b6d949eb-d684-425e-8362-d8109169f299" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_b6d949eb-d684-425e-8362-d8109169f299" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationPercentFDII_ce9f73ef-7555-4ccb-b2d7-5f7815a5540a" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationPercentFDII"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationPercentFDII_ce9f73ef-7555-4ccb-b2d7-5f7815a5540a" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_354dec64-4293-4ee1-b23d-de10eb3d239a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions_354dec64-4293-4ee1-b23d-de10eb3d239a" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_cd2f330e-a6fd-4271-a9aa-5cf169504f5e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_cd2f330e-a6fd-4271-a9aa-5cf169504f5e" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationAmountGILTI_585be1b4-dd57-41d0-86cf-751fde30b1b0" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationAmountGILTI"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationAmountGILTI_585be1b4-dd57-41d0-86cf-751fde30b1b0" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationPercentGILTI_aeb96b65-67af-4073-99f7-254e922781f4" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationPercentGILTI"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationPercentGILTI_aeb96b65-67af-4073-99f7-254e922781f4" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationOperatingLossCarryforwardsValuationAllowanceForForeignCountry_89de1277-81b2-4ea4-973c-c18ec98b3c0f" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationOperatingLossCarryforwardsValuationAllowanceForForeignCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationOperatingLossCarryforwardsValuationAllowanceForForeignCountry_89de1277-81b2-4ea4-973c-c18ec98b3c0f" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationescrowsettlementamount_712415de-f85c-4da8-809e-b5585ed638ba" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationescrowsettlementamount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationescrowsettlementamount_712415de-f85c-4da8-809e-b5585ed638ba" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveTaxRateReconciliationEscrowSettlement_f5ba064d-cd48-41d1-9543-1bd23e0955ab" xlink:href="tg-20210630.xsd#tg_EffectiveTaxRateReconciliationEscrowSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveTaxRateReconciliationEscrowSettlement_f5ba064d-cd48-41d1-9543-1bd23e0955ab" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations_0e4d500a-0e9b-4262-be42-62e8399edc69" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations_0e4d500a-0e9b-4262-be42-62e8399edc69" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowanceAmount_09e8340f-95f1-429a-bd68-6242665b27b5" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowanceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowanceAmount_09e8340f-95f1-429a-bd68-6242665b27b5" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowance_f2f01027-2869-4f5c-9d2b-21c296207e4d" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationCapitalLossCarryforwardsValuationAllowance_f2f01027-2869-4f5c-9d2b-21c296207e4d" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_7b12260d-12d1-42e9-9d2a-e37371891a6b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_7b12260d-12d1-42e9-9d2a-e37371891a6b" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductions_20e25ff4-4975-4a51-bff2-6f2af434b1f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductions_20e25ff4-4975-4a51-bff2-6f2af434b1f5" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationDeductionForDivestitureOfSubsidiaryStock_05791ce2-a821-438e-a3b5-9d01b3726a7b" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationDeductionForDivestitureOfSubsidiaryStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationDeductionForDivestitureOfSubsidiaryStock_05791ce2-a821-438e-a3b5-9d01b3726a7b" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses_688b396e-05e0-4030-b66b-25bfc2c8ab0d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses_688b396e-05e0-4030-b66b-25bfc2c8ab0d" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_12e4ee55-712b-4c1e-bcd5-68aff20c2faf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_12e4ee55-712b-4c1e-bcd5-68aff20c2faf" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_2ca48648-20b0-4802-809f-de9a21aeb4a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_2ca48648-20b0-4802-809f-de9a21aeb4a2" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_DeferredTaxBenefitExpenseValuationAllowanceAdjCapitalLossCarryforwards_af1ba226-e8b4-4950-b5c8-5e69a8cc0d2a" xlink:href="tg-20210630.xsd#tg_DeferredTaxBenefitExpenseValuationAllowanceAdjCapitalLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_DeferredTaxBenefitExpenseValuationAllowanceAdjCapitalLossCarryforwards_af1ba226-e8b4-4950-b5c8-5e69a8cc0d2a" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_BrazilianTaxCreditDeductionPeriod_0cc1040f-c5ae-46c6-99d8-98869dd2c17d" xlink:href="tg-20210630.xsd#tg_BrazilianTaxCreditDeductionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_BrazilianTaxCreditDeductionPeriod_0cc1040f-c5ae-46c6-99d8-98869dd2c17d" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignEarningsRepatriated_030fd982-bfa0-46ea-a3d5-15ca141455cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignEarningsRepatriated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_ForeignEarningsRepatriated_030fd982-bfa0-46ea-a3d5-15ca141455cf" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxHolidayAggregateDollarAmount_ec7801e9-13fd-48e2-a6c8-318172a6d0bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxHolidayAggregateDollarAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxHolidayAggregateDollarAmount_ec7801e9-13fd-48e2-a6c8-318172a6d0bd" xlink:type="arc" order="41"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CurrentEffectiveTaxRateReconciliationSocialContributionOnIncome_61d1eeaf-3617-4372-89bf-234774960556" xlink:href="tg-20210630.xsd#tg_CurrentEffectiveTaxRateReconciliationSocialContributionOnIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_CurrentEffectiveTaxRateReconciliationSocialContributionOnIncome_61d1eeaf-3617-4372-89bf-234774960556" xlink:type="arc" order="42"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_BrazilianTaxHolidayIncentivePeriod_0fae0f87-84c3-47be-8b8f-dccf8fec0164" xlink:href="tg-20210630.xsd#tg_BrazilianTaxHolidayIncentivePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_BrazilianTaxHolidayIncentivePeriod_0fae0f87-84c3-47be-8b8f-dccf8fec0164" xlink:type="arc" order="43"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CurrentEffectiveTaxRateExcludingSocialContributionOnIncome_67db35b7-f7ae-47ee-99c7-2b5deed59ad9" xlink:href="tg-20210630.xsd#tg_CurrentEffectiveTaxRateExcludingSocialContributionOnIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_CurrentEffectiveTaxRateExcludingSocialContributionOnIncome_67db35b7-f7ae-47ee-99c7-2b5deed59ad9" xlink:type="arc" order="44"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_CurrentEffectiveTaxRateIncludingSocialContributionOnIncome_38950105-67bf-4cc8-a9c3-dbb3b3681c16" xlink:href="tg-20210630.xsd#tg_CurrentEffectiveTaxRateIncludingSocialContributionOnIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_CurrentEffectiveTaxRateIncludingSocialContributionOnIncome_38950105-67bf-4cc8-a9c3-dbb3b3681c16" xlink:type="arc" order="45"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_LengthBrazilianTaxIncentive_b80c825e-2c2d-4071-9901-3d9d406229d7" xlink:href="tg-20210630.xsd#tg_LengthBrazilianTaxIncentive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_LengthBrazilianTaxIncentive_b80c825e-2c2d-4071-9901-3d9d406229d7" xlink:type="arc" order="46"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ForeignTaxCreditBrazil_8881f2c2-e14d-486a-a2d7-479648919981" xlink:href="tg-20210630.xsd#tg_ForeignTaxCreditBrazil"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_ForeignTaxCreditBrazil_8881f2c2-e14d-486a-a2d7-479648919981" xlink:type="arc" order="47"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationSocialContributionOnIncome_7abb0f51-f04e-4a98-8522-76787910bcb5" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationSocialContributionOnIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationSocialContributionOnIncome_7abb0f51-f04e-4a98-8522-76787910bcb5" xlink:type="arc" order="48"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateExcludingSocialContributionOnIncome_a23aefba-2f5b-4d2c-804a-8a0098c06894" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateExcludingSocialContributionOnIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateExcludingSocialContributionOnIncome_a23aefba-2f5b-4d2c-804a-8a0098c06894" xlink:type="arc" order="49"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare_cb0c858d-ede9-49cb-9d65-1c9f4714ec71" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare_cb0c858d-ede9-49cb-9d65-1c9f4714ec71" xlink:type="arc" order="50"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateIncludingSocialContributionOnIncome_43b41771-1b62-4876-97bf-67f20733255a" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateIncludingSocialContributionOnIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationFederalStatutoryTaxRateIncludingSocialContributionOnIncome_43b41771-1b62-4876-97bf-67f20733255a" xlink:type="arc" order="51"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_0ba449a4-3bf8-4274-b4ed-4fdb9350260c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_0ba449a4-3bf8-4274-b4ed-4fdb9350260c" xlink:type="arc" order="52"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_WorthlessStockTaxDeductibleAmount_815751b4-e39d-4e3c-9d23-476f65efbf53" xlink:href="tg-20210630.xsd#tg_WorthlessStockTaxDeductibleAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_WorthlessStockTaxDeductibleAmount_815751b4-e39d-4e3c-9d23-476f65efbf53" xlink:type="arc" order="53"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3fa3409e-19a7-4a86-a5fa-b1f0ed9aef75" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3fa3409e-19a7-4a86-a5fa-b1f0ed9aef75" xlink:type="arc" order="54"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_3d841249-9b25-4a39-9845-20cbe4da23cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_3d841249-9b25-4a39-9845-20cbe4da23cd" xlink:type="arc" order="55"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveTaxRateReconciliationWorthlessStock_e195c2a1-2aaa-494a-b90d-624dca9fe1fe" xlink:href="tg-20210630.xsd#tg_EffectiveTaxRateReconciliationWorthlessStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveTaxRateReconciliationWorthlessStock_e195c2a1-2aaa-494a-b90d-624dca9fe1fe" xlink:type="arc" order="56"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveTaxRateReconciliationWorthlessStockDeductionsAmount_0ab80fae-15e4-424d-b796-adc8d66e9f4c" xlink:href="tg-20210630.xsd#tg_EffectiveTaxRateReconciliationWorthlessStockDeductionsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveTaxRateReconciliationWorthlessStockDeductionsAmount_0ab80fae-15e4-424d-b796-adc8d66e9f4c" xlink:type="arc" order="57"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_e5c2fc8c-3399-490c-8ef9-7ec607977162" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_e5c2fc8c-3399-490c-8ef9-7ec607977162" xlink:type="arc" order="58"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationDeductionForForeignInvestmentAdjustments_644c9be2-3f39-407d-94d9-6f52ec50d053" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationDeductionForForeignInvestmentAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationDeductionForForeignInvestmentAdjustments_644c9be2-3f39-407d-94d9-6f52ec50d053" xlink:type="arc" order="59"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_bd6951d4-ec6f-4e2f-aa9f-2f7c44d36914" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_bd6951d4-ec6f-4e2f-aa9f-2f7c44d36914" xlink:type="arc" order="60"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationInterestExpense_f3649d8b-14c2-4687-a24c-c1f8b7fe3fdf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxExaminationInterestExpense_f3649d8b-14c2-4687-a24c-c1f8b7fe3fdf" xlink:type="arc" order="61"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationInterestAccrued_5cada73a-5ae3-40b9-aee5-635a1677e750" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationInterestAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxExaminationInterestAccrued_5cada73a-5ae3-40b9-aee5-635a1677e750" xlink:type="arc" order="62"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_d70229c5-aa1b-4463-b735-53e1a833d57e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_d70229c5-aa1b-4463-b735-53e1a833d57e" xlink:type="arc" order="63"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:href="tg-20210630.xsd#tg_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tg_IncomeTaxesLineItems_481546e4-a288-449b-98df-198171df6aba" xlink:to="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxBeneficiaryAxis_1c942475-2c28-4e85-a98c-9bcab673607d" xlink:href="tg-20210630.xsd#tg_IncomeTaxBeneficiaryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:to="loc_tg_IncomeTaxBeneficiaryAxis_1c942475-2c28-4e85-a98c-9bcab673607d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxBeneficiaryDomain_1c942475-2c28-4e85-a98c-9bcab673607d_default" xlink:href="tg-20210630.xsd#tg_IncomeTaxBeneficiaryDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tg_IncomeTaxBeneficiaryAxis_1c942475-2c28-4e85-a98c-9bcab673607d" xlink:to="loc_tg_IncomeTaxBeneficiaryDomain_1c942475-2c28-4e85-a98c-9bcab673607d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxBeneficiaryDomain_afebfbfb-1612-427f-a2a4-3162d09ddbfe" xlink:href="tg-20210630.xsd#tg_IncomeTaxBeneficiaryDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tg_IncomeTaxBeneficiaryAxis_1c942475-2c28-4e85-a98c-9bcab673607d" xlink:to="loc_tg_IncomeTaxBeneficiaryDomain_afebfbfb-1612-427f-a2a4-3162d09ddbfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_TerphaneLtdaMember_82b841cb-45ce-4f1f-ae3a-081bb6084f5e" xlink:href="tg-20210630.xsd#tg_TerphaneLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxBeneficiaryDomain_afebfbfb-1612-427f-a2a4-3162d09ddbfe" xlink:to="loc_tg_TerphaneLtdaMember_82b841cb-45ce-4f1f-ae3a-081bb6084f5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_d9f83bb2-5b53-45f8-b4cc-712570ae5a14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_d9f83bb2-5b53-45f8-b4cc-712570ae5a14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d9f83bb2-5b53-45f8-b4cc-712570ae5a14_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d9f83bb2-5b53-45f8-b4cc-712570ae5a14" xlink:to="loc_us-gaap_SegmentDomain_d9f83bb2-5b53-45f8-b4cc-712570ae5a14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3de664a6-f2e8-4d27-9641-f903860db82a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d9f83bb2-5b53-45f8-b4cc-712570ae5a14" xlink:to="loc_us-gaap_SegmentDomain_3de664a6-f2e8-4d27-9641-f903860db82a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_FlexiblePackagingFilmsMember_32369fa8-2794-4702-8bc4-e90dc34e6605" xlink:href="tg-20210630.xsd#tg_FlexiblePackagingFilmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3de664a6-f2e8-4d27-9641-f903860db82a" xlink:to="loc_tg_FlexiblePackagingFilmsMember_32369fa8-2794-4702-8bc4-e90dc34e6605" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_71924422-2177-47f4-9713-f0953833bf8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_71924422-2177-47f4-9713-f0953833bf8e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_71924422-2177-47f4-9713-f0953833bf8e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_71924422-2177-47f4-9713-f0953833bf8e" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_71924422-2177-47f4-9713-f0953833bf8e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_b9b8d6ae-2318-4879-8fb4-6c68ee3d5437" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_71924422-2177-47f4-9713-f0953833bf8e" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_b9b8d6ae-2318-4879-8fb4-6c68ee3d5437" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_ExcessCapitalLossesFromInvestmentsAndOtherRelatedItemsMember_6ed33a06-e9de-486d-a984-83855d4a510e" xlink:href="tg-20210630.xsd#tg_ExcessCapitalLossesFromInvestmentsAndOtherRelatedItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_b9b8d6ae-2318-4879-8fb4-6c68ee3d5437" xlink:to="loc_tg_ExcessCapitalLossesFromInvestmentsAndOtherRelatedItemsMember_6ed33a06-e9de-486d-a984-83855d4a510e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_51604bd5-91cc-4430-8ed4-3b0bb734f9b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_51604bd5-91cc-4430-8ed4-3b0bb734f9b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_51604bd5-91cc-4430-8ed4-3b0bb734f9b2_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_51604bd5-91cc-4430-8ed4-3b0bb734f9b2" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_51604bd5-91cc-4430-8ed4-3b0bb734f9b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_fb6b2532-7692-474d-aa66-732f59cf4ad6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_51604bd5-91cc-4430-8ed4-3b0bb734f9b2" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_fb6b2532-7692-474d-aa66-732f59cf4ad6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_BrazilianMember_56831378-454d-4f69-afee-129b0a3a8eb4" xlink:href="tg-20210630.xsd#tg_BrazilianMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_fb6b2532-7692-474d-aa66-732f59cf4ad6" xlink:to="loc_tg_BrazilianMember_56831378-454d-4f69-afee-129b0a3a8eb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BR_8efa5ac2-2de5-4997-a575-2684293ffcfa" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_BR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_fb6b2532-7692-474d-aa66-732f59cf4ad6" xlink:to="loc_country_BR_8efa5ac2-2de5-4997-a575-2684293ffcfa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2b7179e7-9d53-40d9-8848-6ea665032897" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tg_IncomeTaxesTable_e39c473a-173a-445a-a965-048fde1b9043" xlink:to="loc_dei_LegalEntityAxis_2b7179e7-9d53-40d9-8848-6ea665032897" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2b7179e7-9d53-40d9-8848-6ea665032897_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2b7179e7-9d53-40d9-8848-6ea665032897" xlink:to="loc_dei_EntityDomain_2b7179e7-9d53-40d9-8848-6ea665032897_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_60ad942b-eed8-4b72-bd13-498b3b04bcbc" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2b7179e7-9d53-40d9-8848-6ea665032897" xlink:to="loc_dei_EntityDomain_60ad942b-eed8-4b72-bd13-498b3b04bcbc" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails" xlink:type="extended" id="i695feb4d25784b119a0893705657f7d7_IncomeTaxesScheduleOfEffectiveIncomeTaxRateForContinuingOperationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:href="tg-20210630.xsd#tg_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductions_8e62aecd-ae4d-4449-a89a-8e87dc7d3229" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductions_8e62aecd-ae4d-4449-a89a-8e87dc7d3229" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationDeductions_777099cc-9015-4569-b066-b339bcb6a312" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationDeductions_777099cc-9015-4569-b066-b339bcb6a312" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations_5292f604-0f07-4c02-9de8-1105da7a5402" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperations_5292f604-0f07-4c02-9de8-1105da7a5402" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_af9c40a2-b07c-4ac8-94dd-88d5aea510fa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_af9c40a2-b07c-4ac8-94dd-88d5aea510fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_69766119-5747-4149-834c-fc4e21e995a0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_69766119-5747-4149-834c-fc4e21e995a0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount_6eeb7764-2bdb-4b92-8f08-4463e6729013" xlink:href="tg-20210630.xsd#tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_tg_EffectiveIncomeTaxRateReconciliationUnremittedEarningsFromForeignOperationsAmount_6eeb7764-2bdb-4b92-8f08-4463e6729013" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tg_IncomeTaxesTable_07a9850a-0562-42e4-8f2e-13269c57b82d" xlink:href="tg-20210630.xsd#tg_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tg_IncomeTaxesLineItems_b1c955f8-80d4-4b6b-bf38-0fc2911fc81a" xlink:to="loc_tg_IncomeTaxesTable_07a9850a-0562-42e4-8f2e-13269c57b82d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tredegar.com/role/ReceivablesLoansNotesReceivableandOthersDetails" xlink:type="simple" xlink:href="tg-20210630.xsd#ReceivablesLoansNotesReceivableandOthersDetails"/>
  <link:definitionLink xlink:role="http://www.tredegar.com/role/ReceivablesLoansNotesReceivableandOthersDetails" xlink:type="extended" id="i54cc9efaa46044629cbc3a76f4799a3a_ReceivablesLoansNotesReceivableandOthersDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39c6d605-ac5d-46f5-aaa3-67cf2d544be5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_358108e9-7396-4286-a607-098ed036af48" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39c6d605-ac5d-46f5-aaa3-67cf2d544be5" xlink:to="loc_us-gaap_AccountsReceivableGross_358108e9-7396-4286-a607-098ed036af48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_dc9fdb0e-675b-4864-858e-fa48e07cc08b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39c6d605-ac5d-46f5-aaa3-67cf2d544be5" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_dc9fdb0e-675b-4864-858e-fa48e07cc08b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_649a9f30-f714-4373-850b-a14598d61480" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39c6d605-ac5d-46f5-aaa3-67cf2d544be5" xlink:to="loc_us-gaap_AccountsReceivableNet_649a9f30-f714-4373-850b-a14598d61480" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_39c6d605-ac5d-46f5-aaa3-67cf2d544be5" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd028fd2-c38c-41b6-a6c5-d1c2ddb8f475" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd028fd2-c38c-41b6-a6c5-d1c2ddb8f475" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_cd028fd2-c38c-41b6-a6c5-d1c2ddb8f475_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd028fd2-c38c-41b6-a6c5-d1c2ddb8f475" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_cd028fd2-c38c-41b6-a6c5-d1c2ddb8f475_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d4d2ade7-8d66-4d71-8eda-81a8ba86a86f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cd028fd2-c38c-41b6-a6c5-d1c2ddb8f475" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d4d2ade7-8d66-4d71-8eda-81a8ba86a86f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c2edf877-2e36-4f5f-a8a2-08a8851eab7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c2edf877-2e36-4f5f-a8a2-08a8851eab7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_c2edf877-2e36-4f5f-a8a2-08a8851eab7c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c2edf877-2e36-4f5f-a8a2-08a8851eab7c" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_c2edf877-2e36-4f5f-a8a2-08a8851eab7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_947a64d5-e14c-4bf4-8699-78926103b642" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_c2edf877-2e36-4f5f-a8a2-08a8851eab7c" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_947a64d5-e14c-4bf4-8699-78926103b642" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAxis_45ed49b5-d7ad-4b3f-93a0-30e6fefd9e71" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_CollateralAxis_45ed49b5-d7ad-4b3f-93a0-30e6fefd9e71" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralDomain_45ed49b5-d7ad-4b3f-93a0-30e6fefd9e71_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CollateralAxis_45ed49b5-d7ad-4b3f-93a0-30e6fefd9e71" xlink:to="loc_us-gaap_CollateralDomain_45ed49b5-d7ad-4b3f-93a0-30e6fefd9e71_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralDomain_beb23d8c-1c55-46c5-b50e-603a5b4e5a03" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CollateralAxis_45ed49b5-d7ad-4b3f-93a0-30e6fefd9e71" xlink:to="loc_us-gaap_CollateralDomain_beb23d8c-1c55-46c5-b50e-603a5b4e5a03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionAxis_a8431213-64dc-405d-b0f7-133f2710a41a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeographicDistributionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_GeographicDistributionAxis_a8431213-64dc-405d-b0f7-133f2710a41a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionDomain_a8431213-64dc-405d-b0f7-133f2710a41a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeographicDistributionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GeographicDistributionAxis_a8431213-64dc-405d-b0f7-133f2710a41a" xlink:to="loc_us-gaap_GeographicDistributionDomain_a8431213-64dc-405d-b0f7-133f2710a41a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionDomain_effe55d8-880e-403d-8e32-a21a4b947bc4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeographicDistributionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GeographicDistributionAxis_a8431213-64dc-405d-b0f7-133f2710a41a" xlink:to="loc_us-gaap_GeographicDistributionDomain_effe55d8-880e-403d-8e32-a21a4b947bc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_f3273411-693f-4c66-845a-3b5f18c40119" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_f3273411-693f-4c66-845a-3b5f18c40119" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_f3273411-693f-4c66-845a-3b5f18c40119_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_f3273411-693f-4c66-845a-3b5f18c40119" xlink:to="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_f3273411-693f-4c66-845a-3b5f18c40119_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_e39e726c-4444-44cf-bf6a-c6e9eb314f9b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis_f3273411-693f-4c66-845a-3b5f18c40119" xlink:to="loc_us-gaap_ClassOfFinancingReceivableTypeOfBorrowerDomain_e39e726c-4444-44cf-bf6a-c6e9eb314f9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3f0ac10d-4cb8-441e-893b-fb6a83e1d0df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3f0ac10d-4cb8-441e-893b-fb6a83e1d0df" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndustryOfCounterpartyDomain_3f0ac10d-4cb8-441e-893b-fb6a83e1d0df_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndustryOfCounterpartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3f0ac10d-4cb8-441e-893b-fb6a83e1d0df" xlink:to="loc_us-gaap_IndustryOfCounterpartyDomain_3f0ac10d-4cb8-441e-893b-fb6a83e1d0df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndustryOfCounterpartyDomain_1daa477f-fbc1-485e-9657-fa72600131b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndustryOfCounterpartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3f0ac10d-4cb8-441e-893b-fb6a83e1d0df" xlink:to="loc_us-gaap_IndustryOfCounterpartyDomain_1daa477f-fbc1-485e-9657-fa72600131b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_33090cf8-0532-4462-93f8-2f4dd43c284c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_33090cf8-0532-4462-93f8-2f4dd43c284c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LegalEntityTypeOfCounterpartyDomain_33090cf8-0532-4462-93f8-2f4dd43c284c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LegalEntityTypeOfCounterpartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_33090cf8-0532-4462-93f8-2f4dd43c284c" xlink:to="loc_us-gaap_LegalEntityTypeOfCounterpartyDomain_33090cf8-0532-4462-93f8-2f4dd43c284c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LegalEntityTypeOfCounterpartyDomain_faaf1cd3-d5f9-43ab-8c7c-f04411f7fd5c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LegalEntityTypeOfCounterpartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_33090cf8-0532-4462-93f8-2f4dd43c284c" xlink:to="loc_us-gaap_LegalEntityTypeOfCounterpartyDomain_faaf1cd3-d5f9-43ab-8c7c-f04411f7fd5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_ae906b46-3a75-4bba-b1d9-c57a48f5abf6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_srt_CounterpartyNameAxis_ae906b46-3a75-4bba-b1d9-c57a48f5abf6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ae906b46-3a75-4bba-b1d9-c57a48f5abf6_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_ae906b46-3a75-4bba-b1d9-c57a48f5abf6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ae906b46-3a75-4bba-b1d9-c57a48f5abf6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9d4e403d-6489-4cfe-94d8-a77648b28470" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_ae906b46-3a75-4bba-b1d9-c57a48f5abf6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9d4e403d-6489-4cfe-94d8-a77648b28470" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_2e203294-ad0c-4d6b-a78d-7ead7e4ce2db" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_srt_ProductOrServiceAxis_2e203294-ad0c-4d6b-a78d-7ead7e4ce2db" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_2e203294-ad0c-4d6b-a78d-7ead7e4ce2db_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_2e203294-ad0c-4d6b-a78d-7ead7e4ce2db" xlink:to="loc_srt_ProductsAndServicesDomain_2e203294-ad0c-4d6b-a78d-7ead7e4ce2db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_25c887c0-0048-4ac7-99e4-e65bd6375fb7" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_2e203294-ad0c-4d6b-a78d-7ead7e4ce2db" xlink:to="loc_srt_ProductsAndServicesDomain_25c887c0-0048-4ac7-99e4-e65bd6375fb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_a9723e94-5077-4ec3-8aab-4b5ed5d80b5e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_srt_ConsolidationItemsAxis_a9723e94-5077-4ec3-8aab-4b5ed5d80b5e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_a9723e94-5077-4ec3-8aab-4b5ed5d80b5e_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_a9723e94-5077-4ec3-8aab-4b5ed5d80b5e" xlink:to="loc_srt_ConsolidationItemsDomain_a9723e94-5077-4ec3-8aab-4b5ed5d80b5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_66045064-5d25-422a-9670-78c0b501de5d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_a9723e94-5077-4ec3-8aab-4b5ed5d80b5e" xlink:to="loc_srt_ConsolidationItemsDomain_66045064-5d25-422a-9670-78c0b501de5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_91c96c7b-6dc1-4785-8b52-cf0f68078a59" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_91c96c7b-6dc1-4785-8b52-cf0f68078a59" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_91c96c7b-6dc1-4785-8b52-cf0f68078a59_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_91c96c7b-6dc1-4785-8b52-cf0f68078a59" xlink:to="loc_us-gaap_SegmentDomain_91c96c7b-6dc1-4785-8b52-cf0f68078a59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ba465d2c-e3eb-4da8-a5cc-c522c6c128a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_91c96c7b-6dc1-4785-8b52-cf0f68078a59" xlink:to="loc_us-gaap_SegmentDomain_ba465d2c-e3eb-4da8-a5cc-c522c6c128a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsAxis_cf74bfc4-02de-4f48-9a05-56fb300e456b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_SubsegmentsAxis_cf74bfc4-02de-4f48-9a05-56fb300e456b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_cf74bfc4-02de-4f48-9a05-56fb300e456b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_cf74bfc4-02de-4f48-9a05-56fb300e456b" xlink:to="loc_us-gaap_SubsegmentsDomain_cf74bfc4-02de-4f48-9a05-56fb300e456b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_6ea6f9d2-e13a-4293-ade8-4721d61eb775" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_cf74bfc4-02de-4f48-9a05-56fb300e456b" xlink:to="loc_us-gaap_SubsegmentsDomain_6ea6f9d2-e13a-4293-ade8-4721d61eb775" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_f0f57377-d379-4436-81be-4acac6454d73" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_srt_StatementGeographicalAxis_f0f57377-d379-4436-81be-4acac6454d73" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_f0f57377-d379-4436-81be-4acac6454d73_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_f0f57377-d379-4436-81be-4acac6454d73" xlink:to="loc_srt_SegmentGeographicalDomain_f0f57377-d379-4436-81be-4acac6454d73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_07cd3749-ce9a-4a97-af4e-38777ce6f9cf" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_f0f57377-d379-4436-81be-4acac6454d73" xlink:to="loc_srt_SegmentGeographicalDomain_07cd3749-ce9a-4a97-af4e-38777ce6f9cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_4f36db4b-a478-45ef-a593-53d83b15c4bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_4f36db4b-a478-45ef-a593-53d83b15c4bd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_4f36db4b-a478-45ef-a593-53d83b15c4bd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_4f36db4b-a478-45ef-a593-53d83b15c4bd" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_4f36db4b-a478-45ef-a593-53d83b15c4bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_458e9398-99d7-4335-8e26-3717811bf3ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_4f36db4b-a478-45ef-a593-53d83b15c4bd" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_458e9398-99d7-4335-8e26-3717811bf3ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_7a7957f5-b256-4222-aac3-ab15a99a3e2c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_7a7957f5-b256-4222-aac3-ab15a99a3e2c" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_7a7957f5-b256-4222-aac3-ab15a99a3e2c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_7a7957f5-b256-4222-aac3-ab15a99a3e2c" xlink:to="loc_us-gaap_ReceivableTypeDomain_7a7957f5-b256-4222-aac3-ab15a99a3e2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_6fd13df7-17f3-424b-96ef-e8bd16918545" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_7a7957f5-b256-4222-aac3-ab15a99a3e2c" xlink:to="loc_us-gaap_ReceivableTypeDomain_6fd13df7-17f3-424b-96ef-e8bd16918545" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_b7256724-09e6-49f3-a2b9-15ea6b33d9ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquitySecuritiesByIndustryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_b7256724-09e6-49f3-a2b9-15ea6b33d9ab" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_b7256724-09e6-49f3-a2b9-15ea6b33d9ab_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_b7256724-09e6-49f3-a2b9-15ea6b33d9ab" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_b7256724-09e6-49f3-a2b9-15ea6b33d9ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_497f3b2e-3411-4450-a640-4125685dcd23" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_b7256724-09e6-49f3-a2b9-15ea6b33d9ab" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_497f3b2e-3411-4450-a640-4125685dcd23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_79458f6f-3caf-4fa3-9ed7-cb256ea6ca98" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_79458f6f-3caf-4fa3-9ed7-cb256ea6ca98" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_79458f6f-3caf-4fa3-9ed7-cb256ea6ca98_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_79458f6f-3caf-4fa3-9ed7-cb256ea6ca98" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_79458f6f-3caf-4fa3-9ed7-cb256ea6ca98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_0b972ab7-b735-403a-ac4b-c411692dd4c9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_79458f6f-3caf-4fa3-9ed7-cb256ea6ca98" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_0b972ab7-b735-403a-ac4b-c411692dd4c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_4ed1f533-0493-468f-ae7f-ed7ec535b9f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_6ad473cf-7905-434b-b40d-7b8c4a74c62e" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_4ed1f533-0493-468f-ae7f-ed7ec535b9f5" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_4ed1f533-0493-468f-ae7f-ed7ec535b9f5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_4ed1f533-0493-468f-ae7f-ed7ec535b9f5" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_4ed1f533-0493-468f-ae7f-ed7ec535b9f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_b4efa5dc-e5d5-4915-84ad-9296d38b1fe8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_4ed1f533-0493-468f-ae7f-ed7ec535b9f5" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_b4efa5dc-e5d5-4915-84ad-9296d38b1fe8" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
