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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cb451-6e64-7939-951e-a2945718536b,g:2dd2650a-da05-49a5-a69b-3590b2180cb5-->
<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.ads-pipe.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="wms-20260331.xsd#ConsolidatedBalanceSheetsParenthetical"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cb451-70a4-7cc7-a0e3-dc8d0e0ccbc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_StatementTable_019cb451-70a4-7cc7-a0e3-dc8d0e0ccbc7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a4-77fd-bd11-878ad0d3f089" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cb451-70a4-7cc7-a0e3-dc8d0e0ccbc7" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a4-77fd-bd11-878ad0d3f089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cb451-70a4-77fd-bd11-878ad0d3f089_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a4-77fd-bd11-878ad0d3f089" xlink:to="loc_us-gaap_ClassOfStockDomain_019cb451-70a4-77fd-bd11-878ad0d3f089_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cb451-70a4-7572-a649-3f538f76447c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a4-77fd-bd11-878ad0d3f089" xlink:to="loc_us-gaap_ClassOfStockDomain_019cb451-70a4-7572-a649-3f538f76447c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RedeemableCommonStockMember_019cb451-70a4-7f93-abb0-f71e7a9c7726" xlink:href="wms-20260331.xsd#wms_RedeemableCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cb451-70a4-7572-a649-3f538f76447c" xlink:to="loc_wms_RedeemableCommonStockMember_019cb451-70a4-7f93-abb0-f71e7a9c7726" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019cb451-70a4-7023-afb7-799ffea55259" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019cb451-70a4-7023-afb7-799ffea55259" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_019cb451-70a4-78d4-a779-a72bdeac3000" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_019cb451-70a4-78d4-a779-a72bdeac3000" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_019cb451-70a4-7c63-9daf-514e1e2471c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_019cb451-70a4-7c63-9daf-514e1e2471c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_019cb451-70a4-7c33-a4b8-535ba57f857d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_019cb451-70a4-7c33-a4b8-535ba57f857d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019cb451-70a4-7f18-a827-e95143690fbd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019cb451-70a4-7f18-a827-e95143690fbd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019cb451-70a4-7fd6-8411-bb7f20b57025" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019cb451-70a4-7fd6-8411-bb7f20b57025" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019cb451-70a4-7448-943e-a0f94d8d75a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_CommonStockSharesIssued_019cb451-70a4-7448-943e-a0f94d8d75a8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019cb451-70a4-78be-97ab-8f613010686c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7265-be91-681a05e5eacb" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019cb451-70a4-78be-97ab-8f613010686c" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="wms-20260331.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cb451-70a4-7f6c-9329-701d75ea8dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_StatementTable_019cb451-70a4-7f6c-9329-701d75ea8dd6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019cb451-70a4-77ba-a8e9-0ed4d8d729f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cb451-70a4-7f6c-9329-701d75ea8dd6" xlink:to="loc_us-gaap_CreditFacilityAxis_019cb451-70a4-77ba-a8e9-0ed4d8d729f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-77ba-a8e9-0ed4d8d729f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019cb451-70a4-77ba-a8e9-0ed4d8d729f7" xlink:to="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-77ba-a8e9-0ed4d8d729f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-79ca-9f61-05780b88466c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019cb451-70a4-77ba-a8e9-0ed4d8d729f7" xlink:to="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-79ca-9f61-05780b88466c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TermLoanFacilityMember_019e054a-32be-7ac5-a1b3-abe8e4b2c79c" xlink:href="wms-20260331.xsd#wms_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-79ca-9f61-05780b88466c" xlink:to="loc_wms_TermLoanFacilityMember_019e054a-32be-7ac5-a1b3-abe8e4b2c79c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-70a4-7a9b-9cce-c7ffd8670e6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-79ca-9f61-05780b88466c" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-70a4-7a9b-9cce-c7ffd8670e6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PNCCreditAgreementMember_019cb451-70a4-767e-bed1-9393213ebba3" xlink:href="wms-20260331.xsd#wms_PNCCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-70a4-79ca-9f61-05780b88466c" xlink:to="loc_wms_PNCCreditAgreementMember_019cb451-70a4-767e-bed1-9393213ebba3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7631-8381-d816f3c8d057" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7631-8381-d816f3c8d057" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019cb451-70a4-7402-96d4-6c86c9ff99d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7631-8381-d816f3c8d057" xlink:to="loc_us-gaap_ProfitLoss_019cb451-70a4-7402-96d4-6c86c9ff99d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_019e0545-bafa-7efd-b5a3-660f16b9c8d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7631-8381-d816f3c8d057" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_019e0545-bafa-7efd-b5a3-660f16b9c8d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7631-8381-d816f3c8d057" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019cb451-70a4-72d3-b20f-a9cea13cfe6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_DepreciationAndAmortization_019cb451-70a4-72d3-b20f-a9cea13cfe6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019cb451-70a4-7715-83f8-4794e2be4306" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019cb451-70a4-7715-83f8-4794e2be4306" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfAssets_019cb451-70a4-71bf-b8a5-8e778ace2273" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnSalesOfAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_GainsLossesOnSalesOfAssets_019cb451-70a4-71bf-b8a5-8e778ace2273" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash_019cb451-70a4-7420-bf15-3fa37d8b0073" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash_019cb451-70a4-7420-bf15-3fa37d8b0073" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019cb451-70a4-78e8-99c0-733d09873d04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019cb451-70a4-78e8-99c0-733d09873d04" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InventoryStepUpRelatedToAcquisition_019e0548-cd4e-729f-9412-d8cb4a56f79d" xlink:href="wms-20260331.xsd#wms_InventoryStepUpRelatedToAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_wms_InventoryStepUpRelatedToAcquisition_019e0548-cd4e-729f-9412-d8cb4a56f79d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_UnrealizedGainLossOnDerivativesAndCommodityContractsExcludingForeignExchangeForwardContracts_019cb451-70a4-7c01-9ba0-e2055726f1b1" xlink:href="wms-20260331.xsd#wms_UnrealizedGainLossOnDerivativesAndCommodityContractsExcludingForeignExchangeForwardContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_wms_UnrealizedGainLossOnDerivativesAndCommodityContractsExcludingForeignExchangeForwardContracts_019cb451-70a4-7c01-9ba0-e2055726f1b1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cb451-70a4-7055-96e4-b960343cce51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cb451-70a4-7055-96e4-b960343cce51" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019cb451-70a4-7caf-ad6e-2620b3963c11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019cb451-70a4-7caf-ad6e-2620b3963c11" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7a00-b57b-80d7d888752f" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_019cb451-70a4-7824-9a00-6772668e61c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_019cb451-70a4-7824-9a00-6772668e61c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019cb451-70a4-7800-9223-188d1c4bfc1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019cb451-70a4-7800-9223-188d1c4bfc1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019cb451-70a4-79d2-ad7d-a5b6f51a7966" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019cb451-70a4-79d2-ad7d-a5b6f51a7966" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019cb451-70a4-7777-99d3-74ea9d8aa628" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019cb451-70a4-7777-99d3-74ea9d8aa628" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInDiscontinuedOperations_019e0549-3ea4-790f-9678-6a33488c9c25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cb451-70a4-7084-98ea-6ba3c2d2ce04" xlink:to="loc_us-gaap_NetCashProvidedByUsedInDiscontinuedOperations_019e0549-3ea4-790f-9678-6a33488c9c25" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb451-70a4-77ab-93d8-8fd18382b3b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cb451-70a4-7631-8381-d816f3c8d057" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb451-70a4-77ab-93d8-8fd18382b3b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019cb451-70a4-79e9-a621-76a7ce8fe368" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019cb451-70a4-79e9-a621-76a7ce8fe368" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_019cb451-70a4-72c6-a060-cf601f0a36ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_019cb451-70a4-72c6-a060-cf601f0a36ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019cb451-70a4-7729-86e9-c47d3926d171" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019cb451-70a4-7729-86e9-c47d3926d171" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019cb451-70a4-7d1d-bb4f-76f339cce5d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019cb451-70a4-7d1d-bb4f-76f339cce5d8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb451-70a4-7ec1-9b4a-786d490d6613" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cb451-70a4-7b5b-b66f-de7e6213c155" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb451-70a4-7ec1-9b4a-786d490d6613" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019e3d55-4e57-7650-be48-a0a60ac51521" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019e3d55-4e57-7650-be48-a0a60ac51521" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RepaymentsOfSyndicatedTermLoanFacility_019cb451-70a4-7a76-9f7b-cbd1045c9601" xlink:href="wms-20260331.xsd#wms_RepaymentsOfSyndicatedTermLoanFacility"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_wms_RepaymentsOfSyndicatedTermLoanFacility_019cb451-70a4-7a76-9f7b-cbd1045c9601" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_019cb451-70a4-7c69-bfc5-14d717887e87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_019cb451-70a4-7c69-bfc5-14d717887e87" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_019cb451-70a4-72e0-91a3-bb489d57c534" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_019cb451-70a4-72e0-91a3-bb489d57c534" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_019cb451-70a4-72f9-9aef-38783a8157aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_019cb451-70a4-72f9-9aef-38783a8157aa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019cb451-70a4-7a73-9e9a-73fb76d6de75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019cb451-70a4-7a73-9e9a-73fb76d6de75" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfOtherLongTermDebt_019cb451-70a4-7208-b70c-d2f4710167c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfOtherLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_RepaymentsOfOtherLongTermDebt_019cb451-70a4-7208-b70c-d2f4710167c1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_019cb451-70a4-7dda-a4c4-4c9968389a2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_019cb451-70a4-7dda-a4c4-4c9968389a2e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019cb451-70a4-79ef-a8d1-c270d26c1faa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019cb451-70a4-79ef-a8d1-c270d26c1faa" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_019cb451-70a4-7120-9284-f44cf2fbf3bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_019cb451-70a4-7120-9284-f44cf2fbf3bf" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_019e054a-9f58-7546-898a-189d17761ecd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_019e054a-9f58-7546-898a-189d17761ecd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsMinorityInterest_019cb451-70a4-77a6-944d-8ba509d2a689" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividendsMinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_PaymentsOfDividendsMinorityInterest_019cb451-70a4-77a6-944d-8ba509d2a689" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_019cb451-70a4-756e-89ae-73c543cb042a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_019cb451-70a4-756e-89ae-73c543cb042a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019cb451-70a4-7542-8876-fa3026139d85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019cb451-70a4-7542-8876-fa3026139d85" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019cb451-70a4-703d-9d21-3365ae6ab8cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019cb451-70a4-703d-9d21-3365ae6ab8cd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb451-70a4-7fd7-8a70-f0c5bec59f3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cb451-70a4-7628-9fe1-1a37a7ae31d0" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb451-70a4-7fd7-8a70-f0c5bec59f3a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_019cb451-70a4-783c-97bc-d923a1fbc444" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_019cb451-70a4-783c-97bc-d923a1fbc444" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019cb451-70a4-74f9-89b1-88ca2b7f645a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019cb451-70a4-74f9-89b1-88ca2b7f645a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb451-70a4-7d6a-a25e-2878a2abf965" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb451-70a4-7d6a-a25e-2878a2abf965" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb451-70a4-7ee4-8f78-1f5c9829ab9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_019e054c-2915-7407-83a5-82eb1b8d8224" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_019e054c-2915-7407-83a5-82eb1b8d8224" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations_019e054b-13e3-782e-b6ab-0ba9c2f67430" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a4-7150-be4c-d951965bd2b7" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations_019e054b-13e3-782e-b6ab-0ba9c2f67430" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/ConsolidatedStatementsofStockholdersEquityandMezzanineEquity" xlink:type="simple" xlink:href="wms-20260331.xsd#ConsolidatedStatementsofStockholdersEquityandMezzanineEquity"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/ConsolidatedStatementsofStockholdersEquityandMezzanineEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cb451-70a5-7a0e-9fb3-af0adf3543c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cb451-70a5-7b8c-b735-544557ea94db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a5-7a0e-9fb3-af0adf3543c1" xlink:to="loc_us-gaap_StatementTable_019cb451-70a5-7b8c-b735-544557ea94db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cb451-70a5-72db-a53b-2ada46b449bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cb451-70a5-7b8c-b735-544557ea94db" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cb451-70a5-72db-a53b-2ada46b449bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cb451-70a5-72db-a53b-2ada46b449bf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cb451-70a5-72db-a53b-2ada46b449bf" xlink:to="loc_us-gaap_EquityComponentDomain_019cb451-70a5-72db-a53b-2ada46b449bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cb451-70a5-7b35-8d4c-d1254fb44c50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cb451-70a5-72db-a53b-2ada46b449bf" xlink:to="loc_us-gaap_EquityComponentDomain_019cb451-70a5-7b35-8d4c-d1254fb44c50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019cb451-70a5-7b8e-9d80-b3c42b3de243" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb451-70a5-7b35-8d4c-d1254fb44c50" xlink:to="loc_us-gaap_ParentMember_019cb451-70a5-7b8e-9d80-b3c42b3de243" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cb451-70a5-7548-8324-8f22b45045f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019cb451-70a5-7b8e-9d80-b3c42b3de243" xlink:to="loc_us-gaap_CommonStockMember_019cb451-70a5-7548-8324-8f22b45045f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019cb451-70a5-759a-9301-7baf15bbfe1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019cb451-70a5-7b8e-9d80-b3c42b3de243" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019cb451-70a5-759a-9301-7baf15bbfe1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cb451-70a5-7412-8e24-8985d2963f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019cb451-70a5-7b8e-9d80-b3c42b3de243" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cb451-70a5-7412-8e24-8985d2963f3d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019cb451-70a5-723b-a99e-80827d8fa7d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019cb451-70a5-7b8e-9d80-b3c42b3de243" xlink:to="loc_us-gaap_RetainedEarningsMember_019cb451-70a5-723b-a99e-80827d8fa7d1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019cb451-70a5-7bf5-9dc8-beed6817804a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb451-70a5-7b35-8d4c-d1254fb44c50" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019cb451-70a5-7bf5-9dc8-beed6817804a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019cb451-70a5-7655-b046-79badaeb19a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb451-70a5-7b35-8d4c-d1254fb44c50" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019cb451-70a5-7655-b046-79badaeb19a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a5-7d3e-8cd2-1e638c997910" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cb451-70a5-7b8c-b735-544557ea94db" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a5-7d3e-8cd2-1e638c997910" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7d3e-8cd2-1e638c997910_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a5-7d3e-8cd2-1e638c997910" xlink:to="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7d3e-8cd2-1e638c997910_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7b8c-aa6a-005df051b738" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cb451-70a5-7d3e-8cd2-1e638c997910" xlink:to="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7b8c-aa6a-005df051b738" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RedeemableCommonStockMember_019cb451-70a5-7382-a7a6-42405ed789ea" xlink:href="wms-20260331.xsd#wms_RedeemableCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7b8c-aa6a-005df051b738" xlink:to="loc_wms_RedeemableCommonStockMember_019cb451-70a5-7382-a7a6-42405ed789ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DeferredCompensationUnearnedEsopSharesAdjustmentMember_019cb451-70a5-7d56-94c6-2fc467d33fcb" xlink:href="wms-20260331.xsd#wms_DeferredCompensationUnearnedEsopSharesAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7b8c-aa6a-005df051b738" xlink:to="loc_wms_DeferredCompensationUnearnedEsopSharesAdjustmentMember_019cb451-70a5-7d56-94c6-2fc467d33fcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_MezzanineEquityMember_019cb451-70a5-76fb-b588-3d9baf71261c" xlink:href="wms-20260331.xsd#wms_MezzanineEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cb451-70a5-7b8c-aa6a-005df051b738" xlink:to="loc_wms_MezzanineEquityMember_019cb451-70a5-76fb-b588-3d9baf71261c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019cb451-70a5-7561-a606-43adcc6ead6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockByUniqueDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cb451-70a5-7b8c-b735-544557ea94db" xlink:to="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019cb451-70a5-7561-a606-43adcc6ead6d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_019cb451-70a5-7561-a606-43adcc6ead6d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019cb451-70a5-7561-a606-43adcc6ead6d" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_019cb451-70a5-7561-a606-43adcc6ead6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_019cb451-70a5-7354-9230-d641cf5884d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019cb451-70a5-7561-a606-43adcc6ead6d" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_019cb451-70a5-7354-9230-d641cf5884d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_KSOPRedeemableCommonStockConversionMember_019cb451-70a5-714f-bb36-ebb08689447c" xlink:href="wms-20260331.xsd#wms_KSOPRedeemableCommonStockConversionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_019cb451-70a5-7354-9230-d641cf5884d9" xlink:to="loc_wms_KSOPRedeemableCommonStockConversionMember_019cb451-70a5-714f-bb36-ebb08689447c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb451-70a5-7a0e-9fb3-af0adf3543c1" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_019cb451-70a5-7e61-83a9-a1f307edb06a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_SharesIssued_019cb451-70a5-7e61-83a9-a1f307edb06a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019cb451-70a5-762d-bd8e-144ab2601aca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019cb451-70a5-762d-bd8e-144ab2601aca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019cb451-70a5-77c8-a316-9b15860dca28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_TreasuryStockCommonShares_019cb451-70a5-77c8-a316-9b15860dca28" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_019cb451-70a5-743b-a78e-d5cf279b603f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_019cb451-70a5-743b-a78e-d5cf279b603f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount_019cb451-70a5-7146-a109-9626d4b942fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount_019cb451-70a5-7146-a109-9626d4b942fc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPDeferredShares_019cb451-70a5-70ff-8752-96d76d5e4ba9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOwnershipPlanESOPDeferredShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_EmployeeStockOwnershipPlanESOPDeferredShares_019cb451-70a5-70ff-8752-96d76d5e4ba9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_019cb451-70a5-7adc-9120-9d9fb61471ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_019cb451-70a5-7adc-9120-9d9fb61471ec" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ProfitLossExcludingPortionAttributableToRedeemableNoncontrollingInterest_019cb451-70a5-728e-838d-d144f2903238" xlink:href="wms-20260331.xsd#wms_ProfitLossExcludingPortionAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_wms_ProfitLossExcludingPortionAttributableToRedeemableNoncontrollingInterest_019cb451-70a5-728e-838d-d144f2903238" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019cb451-70a5-7297-9fce-5a07c14ff120" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019cb451-70a5-7297-9fce-5a07c14ff120" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_019cb451-70a5-7bbb-a6f8-e41f8e4e9f57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_DividendsCommonStock_019cb451-70a5-7bbb-a6f8-e41f8e4e9f57" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019cb451-70a5-7b97-b3df-e0f319329319" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019cb451-70a5-7b97-b3df-e0f319329319" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019cb451-70a5-750b-9991-da1ae7b0d10c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019cb451-70a5-750b-9991-da1ae7b0d10c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019cb451-70a5-7f8c-9fd1-9dbd912b85f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019cb451-70a5-7f8c-9fd1-9dbd912b85f2" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TemporaryEquityStockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_019cb451-70a5-7baa-89c0-4c2e2a004686" xlink:href="wms-20260331.xsd#wms_TemporaryEquityStockIssuedDuringPeriodValueEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_wms_TemporaryEquityStockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_019cb451-70a5-7baa-89c0-4c2e2a004686" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TemporaryEquityStockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan_019cb451-70a5-712d-9244-230f18c3eb3d" xlink:href="wms-20260331.xsd#wms_TemporaryEquityStockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_wms_TemporaryEquityStockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan_019cb451-70a5-712d-9244-230f18c3eb3d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_019cb451-70a5-722f-b4dd-4717a359303e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_019cb451-70a5-722f-b4dd-4717a359303e" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019cb451-70a5-7479-bc7d-0750b3e39b08" xlink:href="wms-20260331.xsd#wms_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_wms_TemporaryEquityStockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019cb451-70a5-7479-bc7d-0750b3e39b08" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TemporaryEquityStockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019cb451-70a5-7e81-a4d4-a77293692027" xlink:href="wms-20260331.xsd#wms_TemporaryEquityStockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_wms_TemporaryEquityStockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019cb451-70a5-7e81-a4d4-a77293692027" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019cb451-70a5-7501-bf28-c467c24c576a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019cb451-70a5-7501-bf28-c467c24c576a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019cb451-70a5-73b2-8b85-df498c327c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019cb451-70a5-73b2-8b85-df498c327c1a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cb451-70a5-757c-b039-68ef8a30cc28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cb451-70a5-757c-b039-68ef8a30cc28" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019cb451-70a5-7fda-9b61-4c8ea894a9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019cb451-70a5-7fda-9b61-4c8ea894a9d5" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_019e07ff-d776-7434-a84a-afbee6f307d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_019e07ff-d776-7434-a84a-afbee6f307d5" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019cb451-70a5-7a9c-a290-1a7e1ba89c61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019cb451-70a5-7a9c-a290-1a7e1ba89c61" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019cb451-70a5-7ed0-abfa-3b0c18b8a0ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019cb451-70a5-7ed0-abfa-3b0c18b8a0ef" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019cb451-70a5-7e72-8af3-9ca79ad1f07d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019cb451-70a5-7e72-8af3-9ca79ad1f07d" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cb451-70a5-725e-b4f0-6a07ef4e451f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cb451-70a5-725e-b4f0-6a07ef4e451f" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019cb451-70a5-7dc2-aeb4-333a7577795a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019cb451-70a5-7dc2-aeb4-333a7577795a" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_019cb451-70a5-7777-81e8-7f050b154f79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_019cb451-70a5-7777-81e8-7f050b154f79" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019cb451-70a5-7799-8614-56c30cd72b20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019cb451-70a5-7799-8614-56c30cd72b20" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019cb451-70a5-78a3-b8d1-2e523059c7df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019cb451-70a5-78a3-b8d1-2e523059c7df" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_019cb451-70a5-765e-9548-6c84b47b2550" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb451-70a5-7f69-b024-119713227e86" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_019cb451-70a5-765e-9548-6c84b47b2550" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_019cb451-70a5-7ab9-9232-c9a22680c7d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019cb451-70a5-7296-9413-419f8d420cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019cb451-70a5-7ac0-9f71-ef76eea730c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount_019cb451-70a5-7672-bc7b-32be73bf0152" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityPreferredCarryingAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPDeferredShares_019cb451-70a5-77e2-86ef-dd0ce2474a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOwnershipPlanESOPDeferredShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_019cb451-70a5-72f9-945b-7a064700ae38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_019cb451-70a5-7b30-b2a3-5a26cbc3e036" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BackgroundandSummaryofSignificantAccountingPoliciesAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:href="wms-20260331.xsd#wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:href="wms-20260331.xsd#wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7069-a911-0cc1dee5fda7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7069-a911-0cc1dee5fda7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-70a5-7069-a911-0cc1dee5fda7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7069-a911-0cc1dee5fda7" xlink:to="loc_us-gaap_SegmentDomain_019cb451-70a5-7069-a911-0cc1dee5fda7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-70a5-71ee-8f88-3437beb3582e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7069-a911-0cc1dee5fda7" xlink:to="loc_us-gaap_SegmentDomain_019cb451-70a5-71ee-8f88-3437beb3582e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InfiltratorSegmentMember_019cb451-70a5-7670-8a22-5458091aa79e" xlink:href="wms-20260331.xsd#wms_InfiltratorSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-71ee-8f88-3437beb3582e" xlink:to="loc_wms_InfiltratorSegmentMember_019cb451-70a5-7670-8a22-5458091aa79e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-70a5-7716-ad98-6162db2d02bb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_srt_RangeAxis_019cb451-70a5-7716-ad98-6162db2d02bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-70a5-7716-ad98-6162db2d02bb_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-70a5-7716-ad98-6162db2d02bb" xlink:to="loc_srt_RangeMember_019cb451-70a5-7716-ad98-6162db2d02bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-70a5-7f69-9095-d533194cf489" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-70a5-7716-ad98-6162db2d02bb" xlink:to="loc_srt_RangeMember_019cb451-70a5-7f69-9095-d533194cf489" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-70a5-7fc6-af69-ec618d2658cd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-70a5-7f69-9095-d533194cf489" xlink:to="loc_srt_MinimumMember_019cb451-70a5-7fc6-af69-ec618d2658cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-70a5-78ba-90d3-1df1cc4fd28b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-70a5-7f69-9095-d533194cf489" xlink:to="loc_srt_MaximumMember_019cb451-70a5-78ba-90d3-1df1cc4fd28b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cb451-70a5-72fa-803b-1c082a77b23d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_srt_ProductOrServiceAxis_019cb451-70a5-72fa-803b-1c082a77b23d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cb451-70a5-72fa-803b-1c082a77b23d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cb451-70a5-72fa-803b-1c082a77b23d" xlink:to="loc_srt_ProductsAndServicesDomain_019cb451-70a5-72fa-803b-1c082a77b23d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cb451-70a5-72d3-b418-7b82a1e43ebf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cb451-70a5-72fa-803b-1c082a77b23d" xlink:to="loc_srt_ProductsAndServicesDomain_019cb451-70a5-72d3-b418-7b82a1e43ebf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShippingAndHandlingMember_019cb451-70a5-7e84-8da6-8e76f680ff91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShippingAndHandlingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cb451-70a5-72d3-b418-7b82a1e43ebf" xlink:to="loc_us-gaap_ShippingAndHandlingMember_019cb451-70a5-7e84-8da6-8e76f680ff91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019cb451-70a5-7890-b763-8eecb1beabdf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019cb451-70a5-7890-b763-8eecb1beabdf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019cb451-70a5-7890-b763-8eecb1beabdf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019cb451-70a5-7890-b763-8eecb1beabdf" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019cb451-70a5-7890-b763-8eecb1beabdf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019cb451-70a5-79ac-8a70-4b8f3f1a9b8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019cb451-70a5-7890-b763-8eecb1beabdf" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019cb451-70a5-79ac-8a70-4b8f3f1a9b8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OtherGeneralInsuranceProgramsMember_019cb451-70a5-7276-85b9-b56e8aca16c9" xlink:href="wms-20260331.xsd#wms_OtherGeneralInsuranceProgramsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_019cb451-70a5-79ac-8a70-4b8f3f1a9b8b" xlink:to="loc_wms_OtherGeneralInsuranceProgramsMember_019cb451-70a5-7276-85b9-b56e8aca16c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019cb451-70a5-7d6a-8677-b91298382377" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_srt_MajorCustomersAxis_019cb451-70a5-7d6a-8677-b91298382377" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7d6a-8677-b91298382377_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019cb451-70a5-7d6a-8677-b91298382377" xlink:to="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7d6a-8677-b91298382377_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7131-965c-aa8cfa939122" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019cb451-70a5-7d6a-8677-b91298382377" xlink:to="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7131-965c-aa8cfa939122" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_FergusonEnterprisesMember_019cb451-70a5-76fd-ae91-452a98aabe19" xlink:href="wms-20260331.xsd#wms_FergusonEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7131-965c-aa8cfa939122" xlink:to="loc_wms_FergusonEnterprisesMember_019cb451-70a5-76fd-ae91-452a98aabe19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_FergusonEnterprisesAndCoreAndMainMember_019cb451-70a5-7796-9b48-247165a6f2bd" xlink:href="wms-20260331.xsd#wms_FergusonEnterprisesAndCoreAndMainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7131-965c-aa8cfa939122" xlink:to="loc_wms_FergusonEnterprisesAndCoreAndMainMember_019cb451-70a5-7796-9b48-247165a6f2bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CoreMainMember_019cb451-70a5-7c16-99a8-385fddc34b70" xlink:href="wms-20260331.xsd#wms_CoreMainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019cb451-70a5-7131-965c-aa8cfa939122" xlink:to="loc_wms_CoreMainMember_019cb451-70a5-7c16-99a8-385fddc34b70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cb451-70a5-7fd5-bfc2-57f8c68dd75a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cb451-70a5-7fd5-bfc2-57f8c68dd75a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cb451-70a5-7fd5-bfc2-57f8c68dd75a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cb451-70a5-7fd5-bfc2-57f8c68dd75a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cb451-70a5-7fd5-bfc2-57f8c68dd75a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cb451-70a5-7b02-b80c-e80449a1cff8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cb451-70a5-7fd5-bfc2-57f8c68dd75a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cb451-70a5-7b02-b80c-e80449a1cff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019cb451-70a5-7773-a679-109822e77e53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cb451-70a5-7b02-b80c-e80449a1cff8" xlink:to="loc_us-gaap_SalesRevenueNetMember_019cb451-70a5-7773-a679-109822e77e53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019cb451-70a5-7935-9542-4286ae33c22a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cb451-70a5-7b02-b80c-e80449a1cff8" xlink:to="loc_us-gaap_AccountsReceivableMember_019cb451-70a5-7935-9542-4286ae33c22a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019cb451-70a5-78a1-a266-bac909a503e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-7887-aea2-ae480a524451" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019cb451-70a5-78a1-a266-bac909a503e6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019cb451-70a5-78a1-a266-bac909a503e6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019cb451-70a5-78a1-a266-bac909a503e6" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019cb451-70a5-78a1-a266-bac909a503e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019cb451-70a5-7f08-b624-b6496e4cf2a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019cb451-70a5-78a1-a266-bac909a503e6" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019cb451-70a5-7f08-b624-b6496e4cf2a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019cb451-70a5-7daa-be1b-e6783e6afd01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019cb451-70a5-7f08-b624-b6496e4cf2a8" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019cb451-70a5-7daa-be1b-e6783e6afd01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019cb451-70a5-7f8b-bb64-a5a3240abb20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_NumberOfReportableSegments_019cb451-70a5-7f8b-bb64-a5a3240abb20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_019cb451-70a5-7184-9c73-4b6d80f7e4fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_019cb451-70a5-7184-9c73-4b6d80f7e4fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CapitalizedSoftwareDevelopmentCostEstimatedUsefulLives_019cb451-70a5-774b-a610-300d88f09770" xlink:href="wms-20260331.xsd#wms_CapitalizedSoftwareDevelopmentCostEstimatedUsefulLives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_CapitalizedSoftwareDevelopmentCostEstimatedUsefulLives_019cb451-70a5-774b-a610-300d88f09770" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019cb451-70a5-78b7-908c-45154c8deec7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019cb451-70a5-78b7-908c-45154c8deec7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_019cb451-70a5-7b75-84d3-1cb1ca9319dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_AdvertisingExpense_019cb451-70a5-7b75-84d3-1cb1ca9319dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SelfInsuranceReserve_019cb451-70a5-7396-a5ea-0b387fb97041" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SelfInsuranceReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_SelfInsuranceReserve_019cb451-70a5-7396-a5ea-0b387fb97041" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SelfInsurancePlanEmployeesContributionAmount_019cb451-70a5-78ef-9530-817031804f4c" xlink:href="wms-20260331.xsd#wms_SelfInsurancePlanEmployeesContributionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_SelfInsurancePlanEmployeesContributionAmount_019cb451-70a5-78ef-9530-817031804f4c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SelfInsuranceCoverageDeductiblesPerOccurrenceForGeneralLiability_019cb451-70a5-7172-9c74-2a7bbc950d28" xlink:href="wms-20260331.xsd#wms_SelfInsuranceCoverageDeductiblesPerOccurrenceForGeneralLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_SelfInsuranceCoverageDeductiblesPerOccurrenceForGeneralLiability_019cb451-70a5-7172-9c74-2a7bbc950d28" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SelfInsuranceCoverageDeductiblesPerOccurrenceForAutomobile_019cb451-70a5-7572-9d27-35e3ed2eaeff" xlink:href="wms-20260331.xsd#wms_SelfInsuranceCoverageDeductiblesPerOccurrenceForAutomobile"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_SelfInsuranceCoverageDeductiblesPerOccurrenceForAutomobile_019cb451-70a5-7572-9d27-35e3ed2eaeff" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInSelfInsuranceReserve_019cb451-70a5-79c9-918a-ef6a3c9a8d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInSelfInsuranceReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_IncreaseDecreaseInSelfInsuranceReserve_019cb451-70a5-79c9-918a-ef6a3c9a8d9e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SelfInsuranceStopLossLimitPerParticipant_019cb451-70a5-7a08-a927-e1e2706eb86d" xlink:href="wms-20260331.xsd#wms_SelfInsuranceStopLossLimitPerParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_SelfInsuranceStopLossLimitPerParticipant_019cb451-70a5-7a08-a927-e1e2706eb86d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement_019cb451-70a5-7567-bd3b-49091b1c5b4d" xlink:href="wms-20260331.xsd#wms_MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement_019cb451-70a5-7567-bd3b-49091b1c5b4d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ConcentrationRiskNumberOfCustomers_019cb451-70a5-7aaf-8e95-303d0f5c08b3" xlink:href="wms-20260331.xsd#wms_ConcentrationRiskNumberOfCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_wms_ConcentrationRiskNumberOfCustomers_019cb451-70a5-7aaf-8e95-303d0f5c08b3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019cb451-70a5-7f01-baa2-8d902d87ede1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7e5c-bd17-bc95f0237287" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019cb451-70a5-7f01-baa2-8d902d87ede1" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesSummaryofReceivablesDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BackgroundandSummaryofSignificantAccountingPoliciesSummaryofReceivablesDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesSummaryofReceivablesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7783-8d7d-c36b5c0b5a5f" xlink:href="wms-20260331.xsd#wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-72a2-ba10-eb36fa535ab9" xlink:href="wms-20260331.xsd#wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7783-8d7d-c36b5c0b5a5f" xlink:to="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-72a2-ba10-eb36fa535ab9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7795-800c-603938372728" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-72a2-ba10-eb36fa535ab9" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7795-800c-603938372728" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7795-800c-603938372728_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7795-800c-603938372728" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7795-800c-603938372728_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7a83-bb8e-44c1ae3df35f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7795-800c-603938372728" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7a83-bb8e-44c1ae3df35f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeAccountsReceivableMember_019cb451-70a5-7d55-9137-2bbd72508b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeAccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7a83-bb8e-44c1ae3df35f" xlink:to="loc_us-gaap_TradeAccountsReceivableMember_019cb451-70a5-7d55-9137-2bbd72508b2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OtherMiscellaneousReceivablesMember_019cb451-70a5-7c4c-9176-3685c48e4294" xlink:href="wms-20260331.xsd#wms_OtherMiscellaneousReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7a83-bb8e-44c1ae3df35f" xlink:to="loc_wms_OtherMiscellaneousReceivablesMember_019cb451-70a5-7c4c-9176-3685c48e4294" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_019cb451-70a5-749a-932c-1fb406fba74e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-7783-8d7d-c36b5c0b5a5f" xlink:to="loc_us-gaap_ReceivablesNetCurrent_019cb451-70a5-749a-932c-1fb406fba74e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesEstimatedUsefulLivesofRelatedAssetsDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BackgroundandSummaryofSignificantAccountingPoliciesEstimatedUsefulLivesofRelatedAssetsDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesEstimatedUsefulLivesofRelatedAssetsDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7d1b-b2be-1a563bc92872" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-75de-8e07-1eed7e2d55d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7d1b-b2be-1a563bc92872" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-75de-8e07-1eed7e2d55d1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-77e7-bdff-d81c5244ecdc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-75de-8e07-1eed7e2d55d1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-77e7-bdff-d81c5244ecdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-77e7-bdff-d81c5244ecdc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-77e7-bdff-d81c5244ecdc" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-77e7-bdff-d81c5244ecdc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-79cd-b4d3-81d9bd1db0f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-77e7-bdff-d81c5244ecdc" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-79cd-b4d3-81d9bd1db0f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_BuildingsAndLeaseholdImprovementsMember_019cb451-70a5-75c2-b97a-98a8e79a4f88" xlink:href="wms-20260331.xsd#wms_BuildingsAndLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-79cd-b4d3-81d9bd1db0f7" xlink:to="loc_wms_BuildingsAndLeaseholdImprovementsMember_019cb451-70a5-75c2-b97a-98a8e79a4f88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_MachineryAndProductionEquipmentMember_019cb451-70a5-7abd-816f-cb4bb4d28768" xlink:href="wms-20260331.xsd#wms_MachineryAndProductionEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-79cd-b4d3-81d9bd1db0f7" xlink:to="loc_wms_MachineryAndProductionEquipmentMember_019cb451-70a5-7abd-816f-cb4bb4d28768" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransportationEquipmentMember_019cb451-70a5-7db7-b74f-982c3b895b0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-79cd-b4d3-81d9bd1db0f7" xlink:to="loc_us-gaap_TransportationEquipmentMember_019cb451-70a5-7db7-b74f-982c3b895b0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-70a5-7acf-9342-42cf4a34e078" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-75de-8e07-1eed7e2d55d1" xlink:to="loc_srt_RangeAxis_019cb451-70a5-7acf-9342-42cf4a34e078" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-70a5-7acf-9342-42cf4a34e078_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-70a5-7acf-9342-42cf4a34e078" xlink:to="loc_srt_RangeMember_019cb451-70a5-7acf-9342-42cf4a34e078_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-70a5-756b-b981-730af5b3424e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-70a5-7acf-9342-42cf4a34e078" xlink:to="loc_srt_RangeMember_019cb451-70a5-756b-b981-730af5b3424e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-70a5-7588-a87d-73eb28bd6704" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-70a5-756b-b981-730af5b3424e" xlink:to="loc_srt_MinimumMember_019cb451-70a5-7588-a87d-73eb28bd6704" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-70a5-7eb8-95c5-ba9758452556" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-70a5-756b-b981-730af5b3424e" xlink:to="loc_srt_MaximumMember_019cb451-70a5-7eb8-95c5-ba9758452556" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019cb451-70a5-74d9-b3ba-54d559708aee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7d1b-b2be-1a563bc92872" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019cb451-70a5-74d9-b3ba-54d559708aee" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#BackgroundandSummaryofSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BackgroundandSummaryofSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-768a-a998-918a6423b758" xlink:href="wms-20260331.xsd#wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-79ac-87d7-11664845dc02" xlink:href="wms-20260331.xsd#wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-768a-a998-918a6423b758" xlink:to="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-79ac-87d7-11664845dc02" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7105-8c98-16aa46ecc207" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesTable_019cb451-70a5-79ac-87d7-11664845dc02" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7105-8c98-16aa46ecc207" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7105-8c98-16aa46ecc207_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7105-8c98-16aa46ecc207" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7105-8c98-16aa46ecc207_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7272-a206-78c3eb440d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cb451-70a5-7105-8c98-16aa46ecc207" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7272-a206-78c3eb440d1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_IncomeTaxReceivableMember_019cb451-70a5-7ad5-ab44-09adcc44c78f" xlink:href="wms-20260331.xsd#wms_IncomeTaxReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7272-a206-78c3eb440d1d" xlink:to="loc_wms_IncomeTaxReceivableMember_019cb451-70a5-7ad5-ab44-09adcc44c78f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InsuranceRecoverableMember_019cb451-70a5-7f9d-8fcb-b16df9335c7f" xlink:href="wms-20260331.xsd#wms_InsuranceRecoverableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cb451-70a5-7272-a206-78c3eb440d1d" xlink:to="loc_wms_InsuranceRecoverableMember_019cb451-70a5-7f9d-8fcb-b16df9335c7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_019cb451-70a5-7ab6-8473-e53e6051d8d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems_019cb451-70a5-768a-a998-918a6423b758" xlink:to="loc_us-gaap_ReceivablesNetCurrent_019cb451-70a5-7ab6-8473-e53e6051d8d7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/RevenueRecognitionDisaggregationofRevenueDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#RevenueRecognitionDisaggregationofRevenueDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/RevenueRecognitionDisaggregationofRevenueDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e0802-778f-7d8b-8c79-d07b7e3f4349" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e0802-778f-7a8e-8e18-ba50abd8f5e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e0802-778f-7d8b-8c79-d07b7e3f4349" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e0802-778f-7a8e-8e18-ba50abd8f5e9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e0802-778f-736b-b669-d6f85cc4e5cc" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e0802-778f-7a8e-8e18-ba50abd8f5e9" xlink:to="loc_srt_ConsolidationItemsAxis_019e0802-778f-736b-b669-d6f85cc4e5cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e0802-778f-736b-b669-d6f85cc4e5cc_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e0802-778f-736b-b669-d6f85cc4e5cc" xlink:to="loc_srt_ConsolidationItemsDomain_019e0802-778f-736b-b669-d6f85cc4e5cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e0802-778f-7390-83e2-c830c65381ac" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e0802-778f-736b-b669-d6f85cc4e5cc" xlink:to="loc_srt_ConsolidationItemsDomain_019e0802-778f-7390-83e2-c830c65381ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e0802-778f-78eb-b9c2-8d674a6bf293" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e0802-778f-7390-83e2-c830c65381ac" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e0802-778f-78eb-b9c2-8d674a6bf293" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019e27cb-1ebe-7486-b0f3-379936841a35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e0802-778f-7390-83e2-c830c65381ac" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019e27cb-1ebe-7486-b0f3-379936841a35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e0802-778f-798b-a84e-e1c1741b56f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e0802-778f-7a8e-8e18-ba50abd8f5e9" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e0802-778f-798b-a84e-e1c1741b56f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e0802-778f-798b-a84e-e1c1741b56f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e0802-778f-798b-a84e-e1c1741b56f8" xlink:to="loc_us-gaap_SegmentDomain_019e0802-778f-798b-a84e-e1c1741b56f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e0802-778f-70ed-a0c5-9bee47bc5824" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e0802-778f-798b-a84e-e1c1741b56f8" xlink:to="loc_us-gaap_SegmentDomain_019e0802-778f-70ed-a0c5-9bee47bc5824" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_StormwaterSegmentMember_019e0802-778f-716d-8602-0ae4df417d13" xlink:href="wms-20260331.xsd#wms_StormwaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e0802-778f-70ed-a0c5-9bee47bc5824" xlink:to="loc_wms_StormwaterSegmentMember_019e0802-778f-716d-8602-0ae4df417d13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InternationalSegmentMember_019e0803-0988-7d74-a2df-82cc15f3ba73" xlink:href="wms-20260331.xsd#wms_InternationalSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e0802-778f-70ed-a0c5-9bee47bc5824" xlink:to="loc_wms_InternationalSegmentMember_019e0803-0988-7d74-a2df-82cc15f3ba73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_WastewaterSegmentMember_019e0806-234d-767f-9c50-35a7bdab2d22" xlink:href="wms-20260331.xsd#wms_WastewaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e0802-778f-70ed-a0c5-9bee47bc5824" xlink:to="loc_wms_WastewaterSegmentMember_019e0806-234d-767f-9c50-35a7bdab2d22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e0803-0988-726a-8d11-7e1026bbb571" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e0802-778f-7a8e-8e18-ba50abd8f5e9" xlink:to="loc_srt_ProductOrServiceAxis_019e0803-0988-726a-8d11-7e1026bbb571" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e0803-0988-726a-8d11-7e1026bbb571_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e0803-0988-726a-8d11-7e1026bbb571" xlink:to="loc_srt_ProductsAndServicesDomain_019e0803-0988-726a-8d11-7e1026bbb571_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e0803-0988-7ddb-9c45-619745e2c8e0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e0803-0988-726a-8d11-7e1026bbb571" xlink:to="loc_srt_ProductsAndServicesDomain_019e0803-0988-7ddb-9c45-619745e2c8e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DomesticPipeMember_019e0803-b3c0-70d8-874b-8f0346aa39ae" xlink:href="wms-20260331.xsd#wms_DomesticPipeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e0803-0988-7ddb-9c45-619745e2c8e0" xlink:to="loc_wms_DomesticPipeMember_019e0803-b3c0-70d8-874b-8f0346aa39ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DomesticAlliedProductsMember_019e0804-3331-765c-b27f-9b5a24c4636f" xlink:href="wms-20260331.xsd#wms_DomesticAlliedProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e0803-0988-7ddb-9c45-619745e2c8e0" xlink:to="loc_wms_DomesticAlliedProductsMember_019e0804-3331-765c-b27f-9b5a24c4636f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InternationalMember_019e0804-e80d-75dd-bc48-2543288a337b" xlink:href="wms-20260331.xsd#wms_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e0803-0988-7ddb-9c45-619745e2c8e0" xlink:to="loc_wms_InternationalMember_019e0804-e80d-75dd-bc48-2543288a337b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e0802-778f-72ec-b78d-25f07802c5cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e0802-778f-7d8b-8c79-d07b7e3f4349" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e0802-778f-72ec-b78d-25f07802c5cd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/RestructuringandLossGainOnDisposalOfAssetsAndCostsFromExitAndDisposalActivitiesDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#RestructuringandLossGainOnDisposalOfAssetsAndCostsFromExitAndDisposalActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/RestructuringandLossGainOnDisposalOfAssetsAndCostsFromExitAndDisposalActivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cb451-70a5-7c47-a45b-b0a27ebc91a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cb451-70a5-7c47-a45b-b0a27ebc91a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-70a5-7c9f-96e1-6b4978290cf6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cb451-70a5-7c47-a45b-b0a27ebc91a5" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-70a5-7c9f-96e1-6b4978290cf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-70a5-7c9f-96e1-6b4978290cf6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-70a5-7c9f-96e1-6b4978290cf6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-70a5-7c9f-96e1-6b4978290cf6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-70a5-7d5d-bb42-e077ddc09ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-70a5-7c9f-96e1-6b4978290cf6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-70a5-7d5d-bb42-e077ddc09ddd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SpartanConcreteIncMember_019cb451-70a5-7a3f-9946-d1937d2200d0" xlink:href="wms-20260331.xsd#wms_SpartanConcreteIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-70a5-7d5d-bb42-e077ddc09ddd" xlink:to="loc_wms_SpartanConcreteIncMember_019cb451-70a5-7a3f-9946-d1937d2200d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_JetRecyclingPaperMember_019cb451-70a5-790d-ae37-9d20bd72284a" xlink:href="wms-20260331.xsd#wms_JetRecyclingPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-70a5-7d5d-bb42-e077ddc09ddd" xlink:to="loc_wms_JetRecyclingPaperMember_019cb451-70a5-790d-ae37-9d20bd72284a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_019e080d-eee5-7b15-b274-02034ff4f2d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cb451-70a5-7c47-a45b-b0a27ebc91a5" xlink:to="loc_us-gaap_RestructuringPlanAxis_019e080d-eee5-7b15-b274-02034ff4f2d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019e080d-eee5-7b15-b274-02034ff4f2d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_019e080d-eee5-7b15-b274-02034ff4f2d9" xlink:to="loc_us-gaap_RestructuringPlanDomain_019e080d-eee5-7b15-b274-02034ff4f2d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019e080d-eee5-7d5b-a4ee-29f1a0fea93c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_019e080d-eee5-7b15-b274-02034ff4f2d9" xlink:to="loc_us-gaap_RestructuringPlanDomain_019e080d-eee5-7d5b-a4ee-29f1a0fea93c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A2026RestructuringPlanMember_019e080d-eee5-78ff-8f6b-73017c6c9737" xlink:href="wms-20260331.xsd#wms_A2026RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019e080d-eee5-7d5b-a4ee-29f1a0fea93c" xlink:to="loc_wms_A2026RestructuringPlanMember_019e080d-eee5-78ff-8f6b-73017c6c9737" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e1d1c-8b6d-7b48-b241-82bd427362a7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cb451-70a5-7c47-a45b-b0a27ebc91a5" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e1d1c-8b6d-7b48-b241-82bd427362a7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e1d1c-8b6d-7b48-b241-82bd427362a7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e1d1c-8b6d-7b48-b241-82bd427362a7" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e1d1c-8b6d-7b48-b241-82bd427362a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e1d1c-8b6d-7228-96af-4e2a91fdffb7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e1d1c-8b6d-7b48-b241-82bd427362a7" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e1d1c-8b6d-7228-96af-4e2a91fdffb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_HeldForSalePropertyMember_019e1d1c-8b6d-78cf-8119-51c4d534e38a" xlink:href="wms-20260331.xsd#wms_HeldForSalePropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e1d1c-8b6d-7228-96af-4e2a91fdffb7" xlink:to="loc_wms_HeldForSalePropertyMember_019e1d1c-8b6d-78cf-8119-51c4d534e38a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019cb451-70a5-7bfb-8da2-b4912dc330f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019cb451-70a5-7bfb-8da2-b4912dc330f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherAssets_019cb451-70a5-7d49-994e-d82153bda53a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_GainLossOnSaleOfOtherAssets_019cb451-70a5-7d49-994e-d82153bda53a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveAcceleratedDepreciation_019e080d-eee5-7197-9189-876feb2201fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserveAcceleratedDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_RestructuringReserveAcceleratedDepreciation_019e080d-eee5-7197-9189-876feb2201fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_019e080d-eee5-7c49-991e-afe023a37ebe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeveranceCosts1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_SeveranceCosts1_019e080d-eee5-7c49-991e-afe023a37ebe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseImpairmentLoss_019e080d-eee5-7a2d-bc5e-424f2ad47e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_OperatingLeaseImpairmentLoss_019e080d-eee5-7a2d-bc5e-424f2ad47e2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringCosts_019e080d-eee5-76aa-bee0-be488aec9714" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherRestructuringCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_OtherRestructuringCosts_019e080d-eee5-76aa-bee0-be488aec9714" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RealignmentExpenses_019e080d-eee5-76ba-b6cd-78b7a5450528" xlink:href="wms-20260331.xsd#wms_RealignmentExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_wms_RealignmentExpenses_019e080d-eee5-76ba-b6cd-78b7a5450528" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RestructuringPlanActivities_019e080d-eee5-7109-9539-0bb45fc9baa5" xlink:href="wms-20260331.xsd#wms_RestructuringPlanActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_wms_RestructuringPlanActivities_019e080d-eee5-7109-9539-0bb45fc9baa5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_019e0810-02e9-7617-bd2f-befc6854d298" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_RestructuringReserve_019e0810-02e9-7617-bd2f-befc6854d298" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_019e0810-02e9-7f37-8975-09954775311f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_019e0810-02e9-7f37-8975-09954775311f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NonCashRestructuingCharges_019e0810-02e9-7251-9e2d-4b3f3cfd3cb2" xlink:href="wms-20260331.xsd#wms_NonCashRestructuingCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_wms_NonCashRestructuingCharges_019e0810-02e9-7251-9e2d-4b3f3cfd3cb2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_019e0810-02e9-71fb-9ecf-d7be4d7ab446" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_PaymentsForRestructuring_019e0810-02e9-71fb-9ecf-d7be4d7ab446" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_019e0811-a7ca-7296-9bf5-11feb276da7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cb451-70a5-7f98-a09e-b23c5fb41c48" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_019e0811-a7ca-7296-9bf5-11feb276da7f" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/AcquisitionsAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#AcquisitionsAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/AcquisitionsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7dc1-8823-d219952854cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7dc1-8823-d219952854cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-770a-96f4-46f425533507" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7dc1-8823-d219952854cc" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-770a-96f4-46f425533507" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-770a-96f4-46f425533507_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-770a-96f4-46f425533507" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-770a-96f4-46f425533507_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7bf5-84c2-d5d26ee9a24d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-770a-96f4-46f425533507" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7bf5-84c2-d5d26ee9a24d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NationalDiversifiedSalesMember_019e082b-9d39-7b09-b3cb-60170c46fb8c" xlink:href="wms-20260331.xsd#wms_NationalDiversifiedSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7bf5-84c2-d5d26ee9a24d" xlink:to="loc_wms_NationalDiversifiedSalesMember_019e082b-9d39-7b09-b3cb-60170c46fb8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RiverValleyPipeMember_019e1d32-b1ce-7eb0-af85-14aef4f453f3" xlink:href="wms-20260331.xsd#wms_RiverValleyPipeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7bf5-84c2-d5d26ee9a24d" xlink:to="loc_wms_RiverValleyPipeMember_019e1d32-b1ce-7eb0-af85-14aef4f453f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OrencoSystemsInc.Member_019cb451-70a5-7f92-a988-d7119881d638" xlink:href="wms-20260331.xsd#wms_OrencoSystemsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7bf5-84c2-d5d26ee9a24d" xlink:to="loc_wms_OrencoSystemsInc.Member_019cb451-70a5-7f92-a988-d7119881d638" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019cb451-70a5-7a18-8a2b-7b851378efed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019cb451-70a5-7a18-8a2b-7b851378efed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019cb451-70a5-7bf0-bd08-7f4356560408" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019cb451-70a5-7bf0-bd08-7f4356560408" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cb451-70a5-77a8-84df-e3d82cd8f5f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_Goodwill_019cb451-70a5-77a8-84df-e3d82cd8f5f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019cb451-70a5-7fd0-aa1d-5002ef851907" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019cb451-70a5-7fd0-aa1d-5002ef851907" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_019cb451-70a5-7732-992e-cb1343186495" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAcquiredFromAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_019cb451-70a5-7732-992e-cb1343186495" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CashHeldForSaleFromAcquisition_019e082d-1d69-7612-b729-7f1c41a2580d" xlink:href="wms-20260331.xsd#wms_CashHeldForSaleFromAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_wms_CashHeldForSaleFromAcquisition_019e082d-1d69-7612-b729-7f1c41a2580d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_019e0837-fa32-7091-b079-9472583b6445" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_019e0837-fa32-7091-b079-9472583b6445" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_019e0838-8a63-787e-a9fd-9077b8b6c307" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_019e0838-8a63-787e-a9fd-9077b8b6c307" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_LossFromDiscontinuedOperationsofAcquireeSinceAcquisitionDate_019e0839-c56f-7023-9f68-7f0bc17ebe41" xlink:href="wms-20260331.xsd#wms_LossFromDiscontinuedOperationsofAcquireeSinceAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_wms_LossFromDiscontinuedOperationsofAcquireeSinceAcquisitionDate_019e0839-c56f-7023-9f68-7f0bc17ebe41" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_019e083c-50f4-7910-96e0-705168b0bbfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_019e083c-50f4-7910-96e0-705168b0bbfe" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019e083c-dab6-7963-8aca-38952d0162fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019e083c-dab6-7963-8aca-38952d0162fd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_019e083f-a96a-7034-a215-cc15488c3cde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_019e083f-a96a-7034-a215-cc15488c3cde" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019e083f-a96a-7ea1-a537-6a7446f411ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-7213-acbc-29768666601e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019e083f-a96a-7ea1-a537-6a7446f411ab" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/AcquisitionsSummaryofConsiderationTransferredandPreliminaryPurchasePriceAllocationofAssetsAcquiredandLiabilitiesAssumedDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#AcquisitionsSummaryofConsiderationTransferredandPreliminaryPurchasePriceAllocationofAssetsAcquiredandLiabilitiesAssumedDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/AcquisitionsSummaryofConsiderationTransferredandPreliminaryPurchasePriceAllocationofAssetsAcquiredandLiabilitiesAssumedDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-75be-bcd6-6e2df0b0951f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-75be-bcd6-6e2df0b0951f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-7dbc-a0d7-956f99d01015" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-75be-bcd6-6e2df0b0951f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-7dbc-a0d7-956f99d01015" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7dbc-a0d7-956f99d01015_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-7dbc-a0d7-956f99d01015" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7dbc-a0d7-956f99d01015_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7e51-ba30-34c29c44674a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-7dbc-a0d7-956f99d01015" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7e51-ba30-34c29c44674a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OrencoSystemsInc.Member_019cb451-70a5-7ec9-8116-44c6bf60e673" xlink:href="wms-20260331.xsd#wms_OrencoSystemsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7e51-ba30-34c29c44674a" xlink:to="loc_wms_OrencoSystemsInc.Member_019cb451-70a5-7ec9-8116-44c6bf60e673" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RiverValleyPipeMember_019e0814-59b8-7d67-a1e4-fe1e11aedb85" xlink:href="wms-20260331.xsd#wms_RiverValleyPipeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7e51-ba30-34c29c44674a" xlink:to="loc_wms_RiverValleyPipeMember_019e0814-59b8-7d67-a1e4-fe1e11aedb85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NationalDiversifiedSalesMember_019e082e-3c86-774a-92e5-0dad9a04365e" xlink:href="wms-20260331.xsd#wms_NationalDiversifiedSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-7e51-ba30-34c29c44674a" xlink:to="loc_wms_NationalDiversifiedSalesMember_019e082e-3c86-774a-92e5-0dad9a04365e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e423d-516c-7643-9dac-531c58913a4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e423d-516c-7643-9dac-531c58913a4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019cb451-70a5-79eb-a4af-e7a524561e58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019cb451-70a5-79eb-a4af-e7a524561e58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_AccountsReceivablePurchaseAccountingAdjustments_019cb451-70a5-7b91-a840-801bfc40c692" xlink:href="wms-20260331.xsd#wms_AccountsReceivablePurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_AccountsReceivablePurchaseAccountingAdjustments_019cb451-70a5-7b91-a840-801bfc40c692" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_019cb451-70a5-71ac-bc3e-48bc93e39cd8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_019cb451-70a5-71ac-bc3e-48bc93e39cd8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_019cb451-70a5-7e45-8d6d-3dd6e6c1975b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_019cb451-70a5-7e45-8d6d-3dd6e6c1975b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PropertyPlantAndEquipmentPurchaseAccountingAdjustments_019e4245-7f13-7e8d-863f-893067812d08" xlink:href="wms-20260331.xsd#wms_PropertyPlantAndEquipmentPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_PropertyPlantAndEquipmentPurchaseAccountingAdjustments_019e4245-7f13-7e8d-863f-893067812d08" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_AssetsHeldForSaleAcquired_019e0830-9737-78bc-8d1f-cb822cef64b9" xlink:href="wms-20260331.xsd#wms_AssetsHeldForSaleAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_AssetsHeldForSaleAcquired_019e0830-9737-78bc-8d1f-cb822cef64b9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019cb451-70a5-7422-aa4a-db1aac292ae6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019cb451-70a5-7422-aa4a-db1aac292ae6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cb451-70a5-7efe-ba64-9ac8dcb1b19c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_Goodwill_019cb451-70a5-7efe-ba64-9ac8dcb1b19c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_019cb451-70a5-7e5b-bc9e-f4b50531fad1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_019cb451-70a5-7e5b-bc9e-f4b50531fad1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019cb451-70a5-7574-8615-60a6b5c87197" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019cb451-70a5-7574-8615-60a6b5c87197" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_019e0831-d33e-7de3-9b91-84c21b632a8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_019e0831-d33e-7de3-9b91-84c21b632a8a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019cb451-70a5-73ed-a117-c522d262fb41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019cb451-70a5-73ed-a117-c522d262fb41" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_BusinessCombinationPurchaseAccountingAdjustmentsAssets_019e0864-5e4e-7da9-bb54-e78426747189" xlink:href="wms-20260331.xsd#wms_BusinessCombinationPurchaseAccountingAdjustmentsAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_BusinessCombinationPurchaseAccountingAdjustmentsAssets_019e0864-5e4e-7da9-bb54-e78426747189" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019e0832-7771-7038-9438-38d992cac24e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019e0832-7771-7038-9438-38d992cac24e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019cb451-70a5-7ab1-bcff-272eff627502" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019cb451-70a5-7ab1-bcff-272eff627502" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpenses_019cb451-70a5-7171-a825-4c686bd641a3" xlink:href="wms-20260331.xsd#wms_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedExpenses_019cb451-70a5-7171-a825-4c686bd641a3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_LiabilitiesHeldForSaleAcquired_019e0831-2e75-7fcc-9405-3ec3dca04a1b" xlink:href="wms-20260331.xsd#wms_LiabilitiesHeldForSaleAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_LiabilitiesHeldForSaleAcquired_019e0831-2e75-7fcc-9405-3ec3dca04a1b" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019cb451-70a5-7c81-919d-2bcdfe7f2d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019cb451-70a5-7c81-919d-2bcdfe7f2d2c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019cb451-70a5-74b7-9ade-33af16cc711b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019cb451-70a5-74b7-9ade-33af16cc711b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DeferredTaxLiabilitiesPurchaseAccountingAdjustments_019cb451-70a5-77e1-890e-9dc280a76ca7" xlink:href="wms-20260331.xsd#wms_DeferredTaxLiabilitiesPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_DeferredTaxLiabilitiesPurchaseAccountingAdjustments_019cb451-70a5-77e1-890e-9dc280a76ca7" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_BusinessCombinationPurchaseAccountingAdjustmentsLiabilities_019e0864-c34d-7bde-9897-4ad0e8556345" xlink:href="wms-20260331.xsd#wms_BusinessCombinationPurchaseAccountingAdjustmentsLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_BusinessCombinationPurchaseAccountingAdjustmentsLiabilities_019e0864-c34d-7bde-9897-4ad0e8556345" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019e0833-1165-73ec-84f6-d5ccc43ad850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019e0833-1165-73ec-84f6-d5ccc43ad850" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019cb451-70a5-760d-8821-b4150b10f9aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019cb451-70a5-760d-8821-b4150b10f9aa" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ConsiderationTransferredValuationAdjustments_019e0815-5ac2-7f83-8820-fe0241bc579c" xlink:href="wms-20260331.xsd#wms_ConsiderationTransferredValuationAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-710a-88b9-0cfdd9393d08" xlink:to="loc_wms_ConsiderationTransferredValuationAdjustments_019e0815-5ac2-7f83-8820-fe0241bc579c" xlink:type="arc" order="24"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/AcquisitionsSummaryofIdentifiableIntangibleAssetsDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#AcquisitionsSummaryofIdentifiableIntangibleAssetsDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/AcquisitionsSummaryofIdentifiableIntangibleAssetsDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-780a-9f29-9623100f9ad0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7bb3-ae12-c034a7d9e51d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-780a-9f29-9623100f9ad0" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7bb3-ae12-c034a7d9e51d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-730b-abee-b4ce4c286ad4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7bb3-ae12-c034a7d9e51d" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-730b-abee-b4ce4c286ad4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-730b-abee-b4ce4c286ad4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-730b-abee-b4ce4c286ad4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-730b-abee-b4ce4c286ad4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-757d-bd14-9ea628c1fa58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb451-70a5-730b-abee-b4ce4c286ad4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-757d-bd14-9ea628c1fa58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NationalDiversifiedSalesMember_019e235d-40a7-777c-9fa4-d34768e95c9c" xlink:href="wms-20260331.xsd#wms_NationalDiversifiedSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-757d-bd14-9ea628c1fa58" xlink:to="loc_wms_NationalDiversifiedSalesMember_019e235d-40a7-777c-9fa4-d34768e95c9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RiverValleyPipeMember_019e0867-b690-7b7d-ac1e-a337b369d057" xlink:href="wms-20260331.xsd#wms_RiverValleyPipeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-757d-bd14-9ea628c1fa58" xlink:to="loc_wms_RiverValleyPipeMember_019e0867-b690-7b7d-ac1e-a337b369d057" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OrencoSystemsInc.Member_019cb451-70a5-7de9-a385-c0321587647c" xlink:href="wms-20260331.xsd#wms_OrencoSystemsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb451-70a5-757d-bd14-9ea628c1fa58" xlink:to="loc_wms_OrencoSystemsInc.Member_019cb451-70a5-7de9-a385-c0321587647c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-744e-a5e6-b48122d3df8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019cb451-70a5-7bb3-ae12-c034a7d9e51d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-744e-a5e6-b48122d3df8c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-744e-a5e6-b48122d3df8c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-744e-a5e6-b48122d3df8c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-744e-a5e6-b48122d3df8c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7867-82ab-2dc0d16656bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-744e-a5e6-b48122d3df8c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7867-82ab-2dc0d16656bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019cb451-70a5-7105-997b-8c90f4346fa3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7867-82ab-2dc0d16656bd" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019cb451-70a5-7105-997b-8c90f4346fa3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019cb451-70a5-778c-a4fd-b4817f8529b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7867-82ab-2dc0d16656bd" xlink:to="loc_us-gaap_TradeNamesMember_019cb451-70a5-778c-a4fd-b4817f8529b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019e2343-6413-7d31-800e-ab8d5ef91c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7867-82ab-2dc0d16656bd" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019e2343-6413-7d31-800e-ab8d5ef91c5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_019cb451-70a5-7aa3-9c50-a46709bb322b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-780a-9f29-9623100f9ad0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure_019cb451-70a5-7aa3-9c50-a46709bb322b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019cb451-70a5-7269-920b-192f823c8038" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019cb451-70a5-780a-9f29-9623100f9ad0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019cb451-70a5-7269-920b-192f823c8038" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/AcquisitionsProFormaInformationDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#AcquisitionsProFormaInformationDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/AcquisitionsProFormaInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_019e0841-541c-755c-8583-4c03311658f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_019e0841-541c-79fd-82d3-36e1fae41af4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_019e0841-541c-755c-8583-4c03311658f3" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_019e0841-541c-79fd-82d3-36e1fae41af4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019e0841-541c-7e15-9083-1a893c4a99fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_019e0841-541c-79fd-82d3-36e1fae41af4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019e0841-541c-7e15-9083-1a893c4a99fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e0841-541c-7e15-9083-1a893c4a99fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e0841-541c-7e15-9083-1a893c4a99fd" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e0841-541c-7e15-9083-1a893c4a99fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e0841-541c-7967-a69a-b4c06260a124" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e0841-541c-7e15-9083-1a893c4a99fd" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e0841-541c-7967-a69a-b4c06260a124" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NationalDiversifiedSalesMember_019e0841-b4e7-7f78-b39f-391606ff7d8f" xlink:href="wms-20260331.xsd#wms_NationalDiversifiedSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e0841-541c-7967-a69a-b4c06260a124" xlink:to="loc_wms_NationalDiversifiedSalesMember_019e0841-b4e7-7f78-b39f-391606ff7d8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_019e0842-11f1-71a4-bbd2-d4d271a4e342" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_019e0841-541c-755c-8583-4c03311658f3" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_019e0842-11f1-71a4-bbd2-d4d271a4e342" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_019e0842-508d-79a3-820d-3fed18d764bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_019e0841-541c-755c-8583-4c03311658f3" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_019e0842-508d-79a3-820d-3fed18d764bf" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7201-84eb-9c558c3d770f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-7c9a-b0f3-74595b0ae9ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7201-84eb-9c558c3d770f" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-7c9a-b0f3-74595b0ae9ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7e03-b88a-32bef1d1f47d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cb451-70a5-7c9a-b0f3-74595b0ae9ce" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7e03-b88a-32bef1d1f47d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-7e03-b88a-32bef1d1f47d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7e03-b88a-32bef1d1f47d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-7e03-b88a-32bef1d1f47d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-730a-88ca-15e6b4a43464" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7e03-b88a-32bef1d1f47d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-730a-88ca-15e6b4a43464" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandBuildingsAndImprovementsMember_019cb451-70a5-7d53-a8e2-13adeed318b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandBuildingsAndImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-730a-88ca-15e6b4a43464" xlink:to="loc_us-gaap_LandBuildingsAndImprovementsMember_019cb451-70a5-7d53-a8e2-13adeed318b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_MachineryAndProductionEquipmentMember_019cb451-70a5-7d50-b49c-c53d1cefb5da" xlink:href="wms-20260331.xsd#wms_MachineryAndProductionEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-730a-88ca-15e6b4a43464" xlink:to="loc_wms_MachineryAndProductionEquipmentMember_019cb451-70a5-7d50-b49c-c53d1cefb5da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransportationEquipmentMember_019cb451-70a5-715c-9dcd-81baec607848" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-730a-88ca-15e6b4a43464" xlink:to="loc_us-gaap_TransportationEquipmentMember_019cb451-70a5-715c-9dcd-81baec607848" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019cb451-70a5-7abd-b2a2-2ef8becec33f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-730a-88ca-15e6b4a43464" xlink:to="loc_us-gaap_ConstructionInProgressMember_019cb451-70a5-7abd-b2a2-2ef8becec33f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019cb451-70a5-79ec-98e7-aedaa2e862ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7201-84eb-9c558c3d770f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019cb451-70a5-79ec-98e7-aedaa2e862ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019cb451-70a5-7ad2-97e4-528b0293f672" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7201-84eb-9c558c3d770f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019cb451-70a5-7ad2-97e4-528b0293f672" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019cb451-70a5-7b1c-a605-295350789931" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cb451-70a5-7201-84eb-9c558c3d770f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019cb451-70a5-7b1c-a605-295350789931" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/LeasesAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#LeasesAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/LeasesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-77ac-81f4-b841f3a0fa61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-721d-a585-29c4afd41757" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-77ac-81f4-b841f3a0fa61" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-721d-a585-29c4afd41757" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-70a5-79e9-90dc-02b02358d90f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-721d-a585-29c4afd41757" xlink:to="loc_srt_RangeAxis_019cb451-70a5-79e9-90dc-02b02358d90f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-70a5-79e9-90dc-02b02358d90f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-70a5-79e9-90dc-02b02358d90f" xlink:to="loc_srt_RangeMember_019cb451-70a5-79e9-90dc-02b02358d90f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-70a5-789e-b5f7-37a46e8b43c1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-70a5-79e9-90dc-02b02358d90f" xlink:to="loc_srt_RangeMember_019cb451-70a5-789e-b5f7-37a46e8b43c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-70a5-76c4-8fe9-696c4feb6e7b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-70a5-789e-b5f7-37a46e8b43c1" xlink:to="loc_srt_MinimumMember_019cb451-70a5-76c4-8fe9-696c4feb6e7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-70a5-7720-98e9-d0a0d3d6a7a2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-70a5-789e-b5f7-37a46e8b43c1" xlink:to="loc_srt_MaximumMember_019cb451-70a5-7720-98e9-d0a0d3d6a7a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7132-9e5c-6bf42e046bd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-721d-a585-29c4afd41757" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7132-9e5c-6bf42e046bd5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-7132-9e5c-6bf42e046bd5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7132-9e5c-6bf42e046bd5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-7132-9e5c-6bf42e046bd5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-75ad-82e0-89bfddd44f1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cb451-70a5-7132-9e5c-6bf42e046bd5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-75ad-82e0-89bfddd44f1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RealEstateLeasesMember_019cb451-70a5-7620-a87d-0796db55a53d" xlink:href="wms-20260331.xsd#wms_RealEstateLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cb451-70a5-75ad-82e0-89bfddd44f1f" xlink:to="loc_wms_RealEstateLeasesMember_019cb451-70a5-7620-a87d-0796db55a53d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_LeaseRemainingLeaseTerm_019cb451-70a5-7b96-867b-5169b35d9d2d" xlink:href="wms-20260331.xsd#wms_LeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-77ac-81f4-b841f3a0fa61" xlink:to="loc_wms_LeaseRemainingLeaseTerm_019cb451-70a5-7b96-867b-5169b35d9d2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_LesseeLeaseRenewalTerm_019cb451-70a5-7915-b81d-5948faeadf07" xlink:href="wms-20260331.xsd#wms_LesseeLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-77ac-81f4-b841f3a0fa61" xlink:to="loc_wms_LesseeLeaseRenewalTerm_019cb451-70a5-7915-b81d-5948faeadf07" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/LeasesScheduleofComponentsofLeaseCostDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#LeasesScheduleofComponentsofLeaseCostDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/LeasesScheduleofComponentsofLeaseCostDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-7268-8d0f-8b9f43d39177" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-7c69-ab5d-83f81ab4c039" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-7268-8d0f-8b9f43d39177" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-7c69-ab5d-83f81ab4c039" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cb451-70a5-721d-9289-ddee27592486" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019cb451-70a5-7c69-ab5d-83f81ab4c039" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cb451-70a5-721d-9289-ddee27592486" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-721d-9289-ddee27592486_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cb451-70a5-721d-9289-ddee27592486" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-721d-9289-ddee27592486_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-78de-8844-303dcbcb38af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cb451-70a5-721d-9289-ddee27592486" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-78de-8844-303dcbcb38af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cb451-70a5-7967-a1ef-15476d0ef3ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-78de-8844-303dcbcb38af" xlink:to="loc_us-gaap_CostOfSalesMember_019cb451-70a5-7967-a1ef-15476d0ef3ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cb451-70a5-7c55-99a8-ff5979448490" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-78de-8844-303dcbcb38af" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cb451-70a5-7c55-99a8-ff5979448490" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_019cb451-70a5-7cd9-89ad-a87bdb73a89e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb451-70a5-78de-8844-303dcbcb38af" xlink:to="loc_us-gaap_InterestExpenseMember_019cb451-70a5-7cd9-89ad-a87bdb73a89e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OperatingLeaseCostAbstract_019cb451-70a5-7f85-996b-e0b37021421c" xlink:href="wms-20260331.xsd#wms_OperatingLeaseCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-7268-8d0f-8b9f43d39177" xlink:to="loc_wms_OperatingLeaseCostAbstract_019cb451-70a5-7f85-996b-e0b37021421c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_019cb451-70a5-7a63-918d-e926a60c3af0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_OperatingLeaseCostAbstract_019cb451-70a5-7f85-996b-e0b37021421c" xlink:to="loc_us-gaap_OperatingLeaseCost_019cb451-70a5-7a63-918d-e926a60c3af0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_019cb451-70a5-7b23-bb7d-d74e88c73716" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_OperatingLeaseCostAbstract_019cb451-70a5-7f85-996b-e0b37021421c" xlink:to="loc_us-gaap_ShortTermLeaseCost_019cb451-70a5-7b23-bb7d-d74e88c73716" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OperatingLeaseAndShortTermLeaseCost_019cb451-70a5-733a-8020-a8137a97f3c1" xlink:href="wms-20260331.xsd#wms_OperatingLeaseAndShortTermLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_OperatingLeaseCostAbstract_019cb451-70a5-7f85-996b-e0b37021421c" xlink:to="loc_wms_OperatingLeaseAndShortTermLeaseCost_019cb451-70a5-733a-8020-a8137a97f3c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_FinanceLeaseCostsAbstract_019cb451-70a5-7a99-aae0-64df3291e94d" xlink:href="wms-20260331.xsd#wms_FinanceLeaseCostsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cb451-70a5-7268-8d0f-8b9f43d39177" xlink:to="loc_wms_FinanceLeaseCostsAbstract_019cb451-70a5-7a99-aae0-64df3291e94d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_019cb451-70a5-7339-92f6-f1c4895379cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FinanceLeaseCostsAbstract_019cb451-70a5-7a99-aae0-64df3291e94d" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_019cb451-70a5-7339-92f6-f1c4895379cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_019cb451-70a5-7f1a-94e6-6960e3c0bfe9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FinanceLeaseCostsAbstract_019cb451-70a5-7a99-aae0-64df3291e94d" xlink:to="loc_us-gaap_FinanceLeaseInterestExpense_019cb451-70a5-7f1a-94e6-6960e3c0bfe9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_FinanceLeaseCost_019cb451-70a5-7f64-ad24-5788ab5b7af6" xlink:href="wms-20260331.xsd#wms_FinanceLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FinanceLeaseCostsAbstract_019cb451-70a5-7a99-aae0-64df3291e94d" xlink:to="loc_wms_FinanceLeaseCost_019cb451-70a5-7f64-ad24-5788ab5b7af6" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/GoodwillandIntangibleAssetsCarryingAmountofGoodwillbyReportableSegmentDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#GoodwillandIntangibleAssetsCarryingAmountofGoodwillbyReportableSegmentDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/GoodwillandIntangibleAssetsCarryingAmountofGoodwillbyReportableSegmentDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_019cb451-70a5-7976-9cc8-a0f29dcae4b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_019cb451-70a5-7747-a7ed-18ed318083a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_019cb451-70a5-7976-9cc8-a0f29dcae4b9" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_019cb451-70a5-7747-a7ed-18ed318083a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7201-8a93-ab5939b468d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019cb451-70a5-7747-a7ed-18ed318083a9" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7201-8a93-ab5939b468d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-70a5-7201-8a93-ab5939b468d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7201-8a93-ab5939b468d9" xlink:to="loc_us-gaap_SegmentDomain_019cb451-70a5-7201-8a93-ab5939b468d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-70a5-7201-8a93-ab5939b468d9" xlink:to="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PipeSegmentMember_019cb451-70a5-738c-9b55-67b8883271c3" xlink:href="wms-20260331.xsd#wms_PipeSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:to="loc_wms_PipeSegmentMember_019cb451-70a5-738c-9b55-67b8883271c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InfiltratorSegmentMember_019cb451-70a5-726e-8229-18af55778c69" xlink:href="wms-20260331.xsd#wms_InfiltratorSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:to="loc_wms_InfiltratorSegmentMember_019cb451-70a5-726e-8229-18af55778c69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_InternationalSegmentMember_019cb451-70a5-789a-9260-faa2ce5681a9" xlink:href="wms-20260331.xsd#wms_InternationalSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:to="loc_wms_InternationalSegmentMember_019cb451-70a5-789a-9260-faa2ce5681a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_AlliedProductsAndOtherBusinessSegmentsMember_019cb451-70a5-7c17-9e9f-e3925aae6f80" xlink:href="wms-20260331.xsd#wms_AlliedProductsAndOtherBusinessSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:to="loc_wms_AlliedProductsAndOtherBusinessSegmentsMember_019cb451-70a5-7c17-9e9f-e3925aae6f80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_StormwaterSegmentMember_019e0880-2647-7e88-830e-808b1e7bd851" xlink:href="wms-20260331.xsd#wms_StormwaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:to="loc_wms_StormwaterSegmentMember_019e0880-2647-7e88-830e-808b1e7bd851" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_WastewaterSegmentMember_019e0881-5502-7169-a7cf-0b7b5e92c817" xlink:href="wms-20260331.xsd#wms_WastewaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-70a5-713e-9752-528de67723d6" xlink:to="loc_wms_WastewaterSegmentMember_019e0881-5502-7169-a7cf-0b7b5e92c817" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_019cb451-70a5-74c7-9734-b773cf5b56da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019cb451-70a5-7976-9cc8-a0f29dcae4b9" xlink:to="loc_us-gaap_GoodwillRollForward_019cb451-70a5-74c7-9734-b773cf5b56da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cb451-70a5-78d9-807c-8eedcc8fd912" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019cb451-70a5-74c7-9734-b773cf5b56da" xlink:to="loc_us-gaap_Goodwill_019cb451-70a5-78d9-807c-8eedcc8fd912" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_019cb451-70a5-75c0-b2ac-0f5c2263aa30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019cb451-70a5-74c7-9734-b773cf5b56da" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_019cb451-70a5-75c0-b2ac-0f5c2263aa30" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ReallocationDueToChangeInSegments_019e087f-1c5f-72b5-afc7-2dfe54017fd1" xlink:href="wms-20260331.xsd#wms_ReallocationDueToChangeInSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019cb451-70a5-74c7-9734-b773cf5b56da" xlink:to="loc_wms_ReallocationDueToChangeInSegments_019e087f-1c5f-72b5-afc7-2dfe54017fd1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_019cb451-70a5-76c3-b216-8bc6549e1a68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019cb451-70a5-74c7-9734-b773cf5b56da" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_019cb451-70a5-76c3-b216-8bc6549e1a68" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cb451-70a5-7edd-891d-f4d9601bd4ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/GoodwillandIntangibleAssetsSummaryofIntangibleAssetsDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#GoodwillandIntangibleAssetsSummaryofIntangibleAssetsDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/GoodwillandIntangibleAssetsSummaryofIntangibleAssetsDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:href="wms-20260331.xsd#wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsTable_019cb451-70a5-71c7-8a4f-9a715f72c0c8" xlink:href="wms-20260331.xsd#wms_FiniteAndIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsTable_019cb451-70a5-71c7-8a4f-9a715f72c0c8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7e11-99ce-3aaf9f246b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsTable_019cb451-70a5-71c7-8a4f-9a715f72c0c8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7e11-99ce-3aaf9f246b9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7e11-99ce-3aaf9f246b9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7e11-99ce-3aaf9f246b9c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7e11-99ce-3aaf9f246b9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7484-b499-1c7eb4aed7d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7e11-99ce-3aaf9f246b9c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7484-b499-1c7eb4aed7d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019cb451-70a5-7686-abb6-dbc88a5d4221" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7484-b499-1c7eb4aed7d9" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019cb451-70a5-7686-abb6-dbc88a5d4221" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019cb451-70a5-7a5f-a4ae-24238c77f913" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7484-b499-1c7eb4aed7d9" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019cb451-70a5-7a5f-a4ae-24238c77f913" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PatentsAndNonCompeteAgreementsMember_019cb451-70a5-76cc-9670-4012f3ca6086" xlink:href="wms-20260331.xsd#wms_PatentsAndNonCompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7484-b499-1c7eb4aed7d9" xlink:to="loc_wms_PatentsAndNonCompeteAgreementsMember_019cb451-70a5-76cc-9670-4012f3ca6086" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_019cb451-70a5-77a9-a0e9-069eb5baf8a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7484-b499-1c7eb4aed7d9" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_019cb451-70a5-77a9-a0e9-069eb5baf8a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7301-8e3a-1ffc3ba67f49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsTable_019cb451-70a5-71c7-8a4f-9a715f72c0c8" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7301-8e3a-1ffc3ba67f49" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7301-8e3a-1ffc3ba67f49_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7301-8e3a-1ffc3ba67f49" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-7301-8e3a-1ffc3ba67f49_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-77b6-98f1-b3cdc9d548a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-7301-8e3a-1ffc3ba67f49" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-77b6-98f1-b3cdc9d548a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_019cb451-70a5-7dec-8937-647e7544ce44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-77b6-98f1-b3cdc9d548a8" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_019cb451-70a5-7dec-8937-647e7544ce44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019cb451-70a5-70ea-8fb3-e12c701ea67b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019cb451-70a5-70ea-8fb3-e12c701ea67b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cb451-70a5-7a68-8621-76fe1a0add2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cb451-70a5-7a68-8621-76fe1a0add2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019cb451-70a5-7a87-a561-1414bf2c0a06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019cb451-70a5-7a87-a561-1414bf2c0a06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019cb451-70a5-7a8a-a9a7-b5e5765a97c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019cb451-70a5-7a8a-a9a7-b5e5765a97c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019cb451-70a5-75b7-bd3f-647c6be004eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019cb451-70a5-75b7-bd3f-647c6be004eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb451-70a5-7f12-84d0-b5b499ed0063" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_019cb451-70a5-7ef3-b4b6-c2b42b5ef628" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb451-70a5-7f12-84d0-b5b499ed0063" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/GoodwillandIntangibleAssetsScheduleofAmortizationExpenseandWeightedAverageAmortizationPeriodforDefiniteLivedIntangibleAssetsDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#GoodwillandIntangibleAssetsScheduleofAmortizationExpenseandWeightedAverageAmortizationPeriodforDefiniteLivedIntangibleAssetsDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/GoodwillandIntangibleAssetsScheduleofAmortizationExpenseandWeightedAverageAmortizationPeriodforDefiniteLivedIntangibleAssetsDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cb451-70a5-78e3-8037-59ef3971dfd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cb451-70a5-7fd9-b28f-1bbe4942d8dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cb451-70a5-78e3-8037-59ef3971dfd5" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cb451-70a5-7fd9-b28f-1bbe4942d8dc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-764c-97c8-4cf039ee2381" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cb451-70a5-7fd9-b28f-1bbe4942d8dc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-764c-97c8-4cf039ee2381" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-764c-97c8-4cf039ee2381_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-764c-97c8-4cf039ee2381" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-764c-97c8-4cf039ee2381_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-749d-869b-90340063f724" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cb451-70a5-764c-97c8-4cf039ee2381" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-749d-869b-90340063f724" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019cb451-70a5-73d6-b038-b1952e31cbc8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-749d-869b-90340063f724" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019cb451-70a5-73d6-b038-b1952e31cbc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019cb451-70a5-7f8b-bfb7-ec1b901771bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-749d-869b-90340063f724" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019cb451-70a5-7f8b-bfb7-ec1b901771bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PatentsAndNonCompeteAgreementsMember_019cb451-70a5-7d6f-b11f-7fb3bdeae2ea" xlink:href="wms-20260331.xsd#wms_PatentsAndNonCompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-749d-869b-90340063f724" xlink:to="loc_wms_PatentsAndNonCompeteAgreementsMember_019cb451-70a5-7d6f-b11f-7fb3bdeae2ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_019cb451-70a5-7fb1-aba1-a19352a14de4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cb451-70a5-749d-869b-90340063f724" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_019cb451-70a5-7fb1-aba1-a19352a14de4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019cb451-70a5-7019-a349-f2635ac85541" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cb451-70a5-78e3-8037-59ef3971dfd5" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019cb451-70a5-7019-a349-f2635ac85541" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019cb451-70a5-7d36-92cd-238e9d063e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cb451-70a5-78e3-8037-59ef3971dfd5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019cb451-70a5-7d36-92cd-238e9d063e5a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/FairValueMeasurementandDerivativeTransactionsDerivativeFairValuesDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#FairValueMeasurementandDerivativeTransactionsDerivativeFairValuesDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/FairValueMeasurementandDerivativeTransactionsDerivativeFairValuesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb451-70a5-79a3-93e5-b9804f50de3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-75cf-92dd-4f63a599ead9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb451-70a5-79a3-93e5-b9804f50de3f" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-75cf-92dd-4f63a599ead9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019cb451-70a5-7207-8ec7-4dff9abff9c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-75cf-92dd-4f63a599ead9" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019cb451-70a5-7207-8ec7-4dff9abff9c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-7207-8ec7-4dff9abff9c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cb451-70a5-7207-8ec7-4dff9abff9c5" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-7207-8ec7-4dff9abff9c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-700f-89f9-575850b2e855" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cb451-70a5-7207-8ec7-4dff9abff9c5" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-700f-89f9-575850b2e855" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ReceivablesMember_019cb451-70a5-7539-80d4-39aaba059ae1" xlink:href="wms-20260331.xsd#wms_ReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-700f-89f9-575850b2e855" xlink:to="loc_wms_ReceivablesMember_019cb451-70a5-7539-80d4-39aaba059ae1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_019cb451-70a5-7e72-bc49-9707a42819d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-700f-89f9-575850b2e855" xlink:to="loc_us-gaap_OtherAssetsMember_019cb451-70a5-7e72-bc49-9707a42819d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OtherAccruedLiabilitiesMember_019cb451-70a5-70bb-9f0a-d4cb30055507" xlink:href="wms-20260331.xsd#wms_OtherAccruedLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-700f-89f9-575850b2e855" xlink:to="loc_wms_OtherAccruedLiabilitiesMember_019cb451-70a5-70bb-9f0a-d4cb30055507" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesMember_019cb451-70a5-74e4-b7a6-09f058446871" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb451-70a5-700f-89f9-575850b2e855" xlink:to="loc_us-gaap_OtherLiabilitiesMember_019cb451-70a5-74e4-b7a6-09f058446871" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb451-70a5-72c9-bc18-b34edad0044f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-75cf-92dd-4f63a599ead9" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb451-70a5-72c9-bc18-b34edad0044f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb451-70a5-72c9-bc18-b34edad0044f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb451-70a5-72c9-bc18-b34edad0044f" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb451-70a5-72c9-bc18-b34edad0044f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb451-70a5-7462-bcd0-59017f00a4aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb451-70a5-72c9-bc18-b34edad0044f" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb451-70a5-7462-bcd0-59017f00a4aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DieselFuelOptionCollarsAndSwapsMember_019cb451-70a5-7d31-8050-d581e4097553" xlink:href="wms-20260331.xsd#wms_DieselFuelOptionCollarsAndSwapsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb451-70a5-7462-bcd0-59017f00a4aa" xlink:to="loc_wms_DieselFuelOptionCollarsAndSwapsMember_019cb451-70a5-7d31-8050-d581e4097553" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019cb451-70a5-7430-9265-f1febe03ff7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb451-70a5-79a3-93e5-b9804f50de3f" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019cb451-70a5-7430-9265-f1febe03ff7b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/FairValueMeasurementandDerivativeTransactionsSummaryofCarryingAndFairValueofSeniorNotesDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#FairValueMeasurementandDerivativeTransactionsSummaryofCarryingAndFairValueofSeniorNotesDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/FairValueMeasurementandDerivativeTransactionsSummaryofCarryingAndFairValueofSeniorNotesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb451-70a5-7e44-975a-71c5c7272575" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-7dd9-a64b-52e950b2be96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb451-70a5-7e44-975a-71c5c7272575" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-7dd9-a64b-52e950b2be96" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-73d1-abf2-47a90fc29cf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-7dd9-a64b-52e950b2be96" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-73d1-abf2-47a90fc29cf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-73d1-abf2-47a90fc29cf8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-73d1-abf2-47a90fc29cf8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-73d1-abf2-47a90fc29cf8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-762e-ae91-ecdac02a3ab7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-73d1-abf2-47a90fc29cf8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-762e-ae91-ecdac02a3ab7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019cb451-70a5-7933-a2f7-d10cc2b50298" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-762e-ae91-ecdac02a3ab7" xlink:to="loc_us-gaap_SeniorNotesMember_019cb451-70a5-7933-a2f7-d10cc2b50298" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_EquipmentFinancingMember_019cb451-70a5-771a-8474-fe1255cdc466" xlink:href="wms-20260331.xsd#wms_EquipmentFinancingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-762e-ae91-ecdac02a3ab7" xlink:to="loc_wms_EquipmentFinancingMember_019cb451-70a5-771a-8474-fe1255cdc466" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7f6e-95dc-38e010a5c1f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-7dd9-a64b-52e950b2be96" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7f6e-95dc-38e010a5c1f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7f6e-95dc-38e010a5c1f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7f6e-95dc-38e010a5c1f7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7f6e-95dc-38e010a5c1f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-74f4-9922-2227863a5dcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7f6e-95dc-38e010a5c1f7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-74f4-9922-2227863a5dcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5SeniorNotesDue2027Member_019cb451-70a5-73dc-b4bc-879dce067cee" xlink:href="wms-20260331.xsd#wms_A5SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-74f4-9922-2227863a5dcb" xlink:to="loc_wms_A5SeniorNotesDue2027Member_019cb451-70a5-73dc-b4bc-879dce067cee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A6375SeniorNotesDue2030Member_019cb451-70a5-7797-9352-041e1367737e" xlink:href="wms-20260331.xsd#wms_A6375SeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-74f4-9922-2227863a5dcb" xlink:to="loc_wms_A6375SeniorNotesDue2030Member_019cb451-70a5-7797-9352-041e1367737e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5.375SeniorNotesDue2034_019e1d33-7814-7975-a603-1dce11a0cbab" xlink:href="wms-20260331.xsd#wms_A5.375SeniorNotesDue2034"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-74f4-9922-2227863a5dcb" xlink:to="loc_wms_A5.375SeniorNotesDue2034_019e1d33-7814-7975-a603-1dce11a0cbab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb451-70a5-7d59-b9d9-733772295f4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb451-70a5-7dd9-a64b-52e950b2be96" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb451-70a5-7d59-b9d9-733772295f4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb451-70a5-7d59-b9d9-733772295f4d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb451-70a5-7d59-b9d9-733772295f4d" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb451-70a5-7d59-b9d9-733772295f4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb451-70a5-7413-bf79-8a41339099c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb451-70a5-7d59-b9d9-733772295f4d" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb451-70a5-7413-bf79-8a41339099c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb451-70a5-7165-9334-69cb914b4ac5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb451-70a5-7413-bf79-8a41339099c3" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb451-70a5-7165-9334-69cb914b4ac5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cb451-70a5-7a2a-b200-c8d7ffd2528e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb451-70a5-7165-9334-69cb914b4ac5" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cb451-70a5-7a2a-b200-c8d7ffd2528e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cb451-70a5-795a-86f1-2ef79846ce39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb451-70a5-7165-9334-69cb914b4ac5" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cb451-70a5-795a-86f1-2ef79846ce39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019cb451-70a5-7ec0-8c28-2398bfd4e5ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb451-70a5-7e44-975a-71c5c7272575" xlink:to="loc_us-gaap_LongTermDebtFairValue_019cb451-70a5-7ec0-8c28-2398bfd4e5ca" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/InvestmentInAffiliatesAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#InvestmentInAffiliatesAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/InvestmentInAffiliatesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-78ba-95c9-5c747a7e04e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-7739-baad-239a15cddafd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-78ba-95c9-5c747a7e04e2" xlink:to="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-7739-baad-239a15cddafd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019cb451-70a5-7862-a758-1cbe66136afb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-7739-baad-239a15cddafd" xlink:to="loc_srt_OwnershipAxis_019cb451-70a5-7862-a758-1cbe66136afb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cb451-70a5-7862-a758-1cbe66136afb_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019cb451-70a5-7862-a758-1cbe66136afb" xlink:to="loc_srt_OwnershipDomain_019cb451-70a5-7862-a758-1cbe66136afb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cb451-70a5-7b43-a8dc-82099a91ce87" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019cb451-70a5-7862-a758-1cbe66136afb" xlink:to="loc_srt_OwnershipDomain_019cb451-70a5-7b43-a8dc-82099a91ce87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ADSMexicanaMember_019cb451-70a5-7536-981a-49a4998dd9f1" xlink:href="wms-20260331.xsd#wms_ADSMexicanaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019cb451-70a5-7b43-a8dc-82099a91ce87" xlink:to="loc_wms_ADSMexicanaMember_019cb451-70a5-7536-981a-49a4998dd9f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-7a6e-9518-af1fc638deba" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-7739-baad-239a15cddafd" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-7a6e-9518-af1fc638deba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7a6e-9518-af1fc638deba_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-7a6e-9518-af1fc638deba" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7a6e-9518-af1fc638deba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7d32-873b-0a8b11e17c0d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-7a6e-9518-af1fc638deba" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7d32-873b-0a8b11e17c0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember_019cb451-70a5-7841-a292-ffc29d58ce0a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7d32-873b-0a8b11e17c0d" xlink:to="loc_srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember_019cb451-70a5-7841-a292-ffc29d58ce0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7ccb-850d-99164c578d77" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-7739-baad-239a15cddafd" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7ccb-850d-99164c578d77" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7ccb-850d-99164c578d77_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7ccb-850d-99164c578d77" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7ccb-850d-99164c578d77_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7f73-9ae5-aa693bc85755" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7ccb-850d-99164c578d77" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7f73-9ae5-aa693bc85755" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SouthAmericanJointVentureMember_019cb451-70a5-7eb3-8fd3-8f9b6a23955c" xlink:href="wms-20260331.xsd#wms_SouthAmericanJointVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7f73-9ae5-aa693bc85755" xlink:to="loc_wms_SouthAmericanJointVentureMember_019cb451-70a5-7eb3-8fd3-8f9b6a23955c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NumberOfConsolidatedJointVentures_019cb451-70a5-7886-bd8e-adf3ac5d0540" xlink:href="wms-20260331.xsd#wms_NumberOfConsolidatedJointVentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-78ba-95c9-5c747a7e04e2" xlink:to="loc_wms_NumberOfConsolidatedJointVentures_019cb451-70a5-7886-bd8e-adf3ac5d0540" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019cb451-70a5-76d9-93cf-efd681918db6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-78ba-95c9-5c747a7e04e2" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019cb451-70a5-76d9-93cf-efd681918db6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cb451-70a5-7a2a-88d5-5f290dfecfd2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-78ba-95c9-5c747a7e04e2" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cb451-70a5-7a2a-88d5-5f290dfecfd2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/InvestmentInAffiliatesAssetsandLiabilitiesofJointVenturesDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#InvestmentInAffiliatesAssetsandLiabilitiesofJointVenturesDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/InvestmentInAffiliatesAssetsandLiabilitiesofJointVenturesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-7b96-993a-e9c8c1f1d47b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-74e4-b162-d8ab6cb3d482" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-7b96-993a-e9c8c1f1d47b" xlink:to="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-74e4-b162-d8ab6cb3d482" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cb451-70a5-7e56-a03d-fcee7158b0db" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesTable_019cb451-70a5-74e4-b162-d8ab6cb3d482" xlink:to="loc_dei_LegalEntityAxis_019cb451-70a5-7e56-a03d-fcee7158b0db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cb451-70a5-7e56-a03d-fcee7158b0db_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019cb451-70a5-7e56-a03d-fcee7158b0db" xlink:to="loc_dei_EntityDomain_019cb451-70a5-7e56-a03d-fcee7158b0db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cb451-70a5-7f51-9b3e-99f6aa4fc7ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019cb451-70a5-7e56-a03d-fcee7158b0db" xlink:to="loc_dei_EntityDomain_019cb451-70a5-7f51-9b3e-99f6aa4fc7ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ADSMexicanaMember_019cb451-70a5-7d05-8274-3918bb640f4a" xlink:href="wms-20260331.xsd#wms_ADSMexicanaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cb451-70a5-7f51-9b3e-99f6aa4fc7ad" xlink:to="loc_wms_ADSMexicanaMember_019cb451-70a5-7d05-8274-3918bb640f4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_EQTruePointeOneMember_019e1c59-0c49-7233-93dd-dcb59dac5965" xlink:href="wms-20260331.xsd#wms_EQTruePointeOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cb451-70a5-7f51-9b3e-99f6aa4fc7ad" xlink:to="loc_wms_EQTruePointeOneMember_019e1c59-0c49-7233-93dd-dcb59dac5965" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-7b96-993a-e9c8c1f1d47b" xlink:to="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e0885-0908-7e82-8623-5e1b5dad1047" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e0885-0908-7e82-8623-5e1b5dad1047" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019cb451-70a5-7c23-b713-7ce1d2d2897b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:to="loc_us-gaap_AssetsCurrent_019cb451-70a5-7c23-b713-7ce1d2d2897b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019cb451-70a5-7430-bb46-bb36131892cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019cb451-70a5-7430-bb46-bb36131892cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019cb451-70a5-772c-a515-b9cc11c6383d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019cb451-70a5-772c-a515-b9cc11c6383d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019cb451-70a5-7b84-b4b0-80f20fa41884" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019cb451-70a5-7c43-8a6b-41cc288c3a5b" xlink:to="loc_us-gaap_Assets_019cb451-70a5-7b84-b4b0-80f20fa41884" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_019cb451-70a5-7c6a-a34a-20a72a170433" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsInAndAdvancesToAffiliatesLineItems_019cb451-70a5-7b96-993a-e9c8c1f1d47b" xlink:to="loc_us-gaap_LiabilitiesAbstract_019cb451-70a5-7c6a-a34a-20a72a170433" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019cb451-70a5-77e5-a615-b42e0e4c8f0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cb451-70a5-7c6a-a34a-20a72a170433" xlink:to="loc_us-gaap_LiabilitiesCurrent_019cb451-70a5-77e5-a615-b42e0e4c8f0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019cb451-70a5-74cc-9380-07dc3159874a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cb451-70a5-7c6a-a34a-20a72a170433" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_019cb451-70a5-74cc-9380-07dc3159874a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019cb451-70a5-7f03-a27c-3fa52b488d17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019cb451-70a5-7c6a-a34a-20a72a170433" xlink:to="loc_us-gaap_Liabilities_019cb451-70a5-7f03-a27c-3fa52b488d17" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/RelatedPartyTransactionsAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#RelatedPartyTransactionsAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/RelatedPartyTransactionsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb451-70a5-70b5-914f-81f0ed49adac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb451-70a5-70b5-914f-81f0ed49adac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cb451-70a5-70b5-914f-81f0ed49adac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb451-70a5-70b5-914f-81f0ed49adac" xlink:to="loc_us-gaap_RelatedPartyDomain_019cb451-70a5-70b5-914f-81f0ed49adac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cb451-70a5-7d01-a6b1-bceab848895e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb451-70a5-70b5-914f-81f0ed49adac" xlink:to="loc_us-gaap_RelatedPartyDomain_019cb451-70a5-7d01-a6b1-bceab848895e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember_019cb451-70a5-79ad-a5af-260e46004b11" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cb451-70a5-7d01-a6b1-bceab848895e" xlink:to="loc_srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember_019cb451-70a5-79ad-a5af-260e46004b11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019cb451-70a5-7800-8a13-281b69b1af6a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:to="loc_srt_OwnershipAxis_019cb451-70a5-7800-8a13-281b69b1af6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cb451-70a5-7800-8a13-281b69b1af6a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019cb451-70a5-7800-8a13-281b69b1af6a" xlink:to="loc_srt_OwnershipDomain_019cb451-70a5-7800-8a13-281b69b1af6a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cb451-70a5-7eda-80dc-1a58988b2564" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019cb451-70a5-7800-8a13-281b69b1af6a" xlink:to="loc_srt_OwnershipDomain_019cb451-70a5-7eda-80dc-1a58988b2564" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ADSMexicanaMember_019cb451-70a5-7b24-ba9a-a87e95c42da2" xlink:href="wms-20260331.xsd#wms_ADSMexicanaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019cb451-70a5-7eda-80dc-1a58988b2564" xlink:to="loc_wms_ADSMexicanaMember_019cb451-70a5-7b24-ba9a-a87e95c42da2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7a8a-a319-21972b86bc6c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7a8a-a319-21972b86bc6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7a8a-a319-21972b86bc6c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7a8a-a319-21972b86bc6c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7a8a-a319-21972b86bc6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7e9e-8167-cb9f0152f7ba" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb451-70a5-7a8a-a319-21972b86bc6c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7e9e-8167-cb9f0152f7ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SouthAmericanJointVentureMember_019cb451-70a5-73b4-ba48-f9f7fc37b846" xlink:href="wms-20260331.xsd#wms_SouthAmericanJointVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb451-70a5-7e9e-8167-cb9f0152f7ba" xlink:to="loc_wms_SouthAmericanJointVentureMember_019cb451-70a5-73b4-ba48-f9f7fc37b846" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7216-83f4-1c749989bb4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7216-83f4-1c749989bb4b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7216-83f4-1c749989bb4b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7216-83f4-1c749989bb4b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7216-83f4-1c749989bb4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7b27-a67c-a50c30e3ea8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7216-83f4-1c749989bb4b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7b27-a67c-a50c30e3ea8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_UsDollarDenominatedLoansMember_019cb451-70a5-7e1c-bc54-1b3e27e3ac60" xlink:href="wms-20260331.xsd#wms_UsDollarDenominatedLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7b27-a67c-a50c30e3ea8e" xlink:to="loc_wms_UsDollarDenominatedLoansMember_019cb451-70a5-7e1c-bc54-1b3e27e3ac60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-751e-8fda-334ecae3e67a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb451-70a5-7dcb-9bdb-e3e7b456f7af" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-751e-8fda-334ecae3e67a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-751e-8fda-334ecae3e67a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-751e-8fda-334ecae3e67a" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-751e-8fda-334ecae3e67a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7bd6-ac8e-f13783cdceeb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cb451-70a5-751e-8fda-334ecae3e67a" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7bd6-ac8e-f13783cdceeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember_019cb451-70a5-784e-a109-e18e064ec62c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019cb451-70a5-7bd6-ac8e-f13783cdceeb" xlink:to="loc_srt_ConsolidatedEntityExcludingVariableInterestEntitiesVIEMember_019cb451-70a5-784e-a109-e18e064ec62c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019cb451-70a5-71bf-baa2-bc1083797895" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019cb451-70a5-71bf-baa2-bc1083797895" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019cb451-70a5-7a6c-9c55-b76865e05b86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019cb451-70a5-7a6c-9c55-b76865e05b86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cb451-70a5-75c0-94c7-462c856480e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cb451-70a5-75c0-94c7-462c856480e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PercentageOfDebtSecuredGuaranteed_019cb451-70a5-7fc4-af58-b649d07cfd29" xlink:href="wms-20260331.xsd#wms_PercentageOfDebtSecuredGuaranteed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_wms_PercentageOfDebtSecuredGuaranteed_019cb451-70a5-7fc4-af58-b649d07cfd29" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_019cb451-70a5-70e8-8abd-c64a7555e4c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_019cb451-70a5-70e8-8abd-c64a7555e4c8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019cb451-70a5-7fdf-8b89-b0615c4e7cb0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_LineOfCredit_019cb451-70a5-7fdf-8b89-b0615c4e7cb0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_019cb451-70a5-70bc-aa4c-3f822e9e9091" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb451-70a5-7d08-90b4-054d055acdc0" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_019cb451-70a5-70bc-aa4c-3f822e9e9091" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/DebtLongTermDebtDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#DebtLongTermDebtDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/DebtLongTermDebtDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cb451-70a5-7d37-af89-7fca11b65007" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cb451-70a5-7100-b953-481fe91dd4cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-70a5-7d37-af89-7fca11b65007" xlink:to="loc_us-gaap_DebtInstrumentTable_019cb451-70a5-7100-b953-481fe91dd4cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-7364-a4bc-dd3321e46cd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-70a5-7100-b953-481fe91dd4cd" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-7364-a4bc-dd3321e46cd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7364-a4bc-dd3321e46cd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-7364-a4bc-dd3321e46cd0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7364-a4bc-dd3321e46cd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7f7a-b151-13daaad79c54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cb451-70a5-7364-a4bc-dd3321e46cd0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7f7a-b151-13daaad79c54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TermLoanFacilityMember_019cb451-70a5-727f-a1b4-75cefe3222bd" xlink:href="wms-20260331.xsd#wms_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7f7a-b151-13daaad79c54" xlink:to="loc_wms_TermLoanFacilityMember_019cb451-70a5-727f-a1b4-75cefe3222bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019cb451-70a5-756a-8996-58223cf81cf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7f7a-b151-13daaad79c54" xlink:to="loc_us-gaap_SeniorNotesMember_019cb451-70a5-756a-8996-58223cf81cf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_EquipmentFinancingMember_019cb451-70a5-7a7e-bc1a-8fdfcd54dfe3" xlink:href="wms-20260331.xsd#wms_EquipmentFinancingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-70a5-7f7a-b151-13daaad79c54" xlink:to="loc_wms_EquipmentFinancingMember_019cb451-70a5-7a7e-bc1a-8fdfcd54dfe3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019cb451-70a5-78bf-b025-4226cdc7a4fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-70a5-7100-b953-481fe91dd4cd" xlink:to="loc_us-gaap_CreditFacilityAxis_019cb451-70a5-78bf-b025-4226cdc7a4fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cb451-70a5-78bf-b025-4226cdc7a4fe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019cb451-70a5-78bf-b025-4226cdc7a4fe" xlink:to="loc_us-gaap_CreditFacilityDomain_019cb451-70a5-78bf-b025-4226cdc7a4fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cb451-70a5-7c9d-bdab-89e9f389873e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019cb451-70a5-78bf-b025-4226cdc7a4fe" xlink:to="loc_us-gaap_CreditFacilityDomain_019cb451-70a5-7c9d-bdab-89e9f389873e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-70a5-7943-8cf0-8c56c5f22c63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-70a5-7c9d-bdab-89e9f389873e" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-70a5-7943-8cf0-8c56c5f22c63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7b80-89ff-0729f67e8dc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-70a5-7100-b953-481fe91dd4cd" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7b80-89ff-0729f67e8dc0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7b80-89ff-0729f67e8dc0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7b80-89ff-0729f67e8dc0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7b80-89ff-0729f67e8dc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7591-b6e1-e2ec08a3c817" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-70a5-7b80-89ff-0729f67e8dc0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7591-b6e1-e2ec08a3c817" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5SeniorNotesDue2027Member_019cb451-70a5-74a2-8686-b7f7190fce68" xlink:href="wms-20260331.xsd#wms_A5SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7591-b6e1-e2ec08a3c817" xlink:to="loc_wms_A5SeniorNotesDue2027Member_019cb451-70a5-74a2-8686-b7f7190fce68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A6375SeniorNotesDue2030Member_019cb451-70a5-7455-bf0e-63736f789f6c" xlink:href="wms-20260331.xsd#wms_A6375SeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7591-b6e1-e2ec08a3c817" xlink:to="loc_wms_A6375SeniorNotesDue2030Member_019cb451-70a5-7455-bf0e-63736f789f6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-70a5-7307-b648-8e5aab5f9c85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7591-b6e1-e2ec08a3c817" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-70a5-7307-b648-8e5aab5f9c85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5.375SeniorNotesDue2034_019e0886-63b7-7f1f-9990-85ffbdef4074" xlink:href="wms-20260331.xsd#wms_A5.375SeniorNotesDue2034"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-70a5-7591-b6e1-e2ec08a3c817" xlink:to="loc_wms_A5.375SeniorNotesDue2034_019e0886-63b7-7f1f-9990-85ffbdef4074" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e0886-63b7-7232-953c-12fb911009fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-70a5-7100-b953-481fe91dd4cd" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e0886-63b7-7232-953c-12fb911009fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e0886-63b7-7232-953c-12fb911009fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e0886-63b7-7232-953c-12fb911009fb" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e0886-63b7-7232-953c-12fb911009fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e1d1f-3ee8-7850-96d3-0dd4ce8172bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e0886-63b7-7232-953c-12fb911009fb" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e1d1f-3ee8-7850-96d3-0dd4ce8172bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e0886-63b7-72e9-ad5f-5a1cb5a46e10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e1d1f-3ee8-7850-96d3-0dd4ce8172bd" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e0886-63b7-72e9-ad5f-5a1cb5a46e10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e0886-63b7-71b6-ba4d-de6a88d63c36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e0886-63b7-72e9-ad5f-5a1cb5a46e10" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e0886-63b7-71b6-ba4d-de6a88d63c36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019cb451-70a5-7c37-9434-866300ea2755" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-70a5-7d37-af89-7fca11b65007" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019cb451-70a5-7c37-9434-866300ea2755" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_019cb451-70a5-7d6b-9dc8-9c635511077f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-70a5-7d37-af89-7fca11b65007" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_019cb451-70a5-7d6b-9dc8-9c635511077f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019cb451-70a5-7403-87ca-ce788db6a0b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-70a5-7d37-af89-7fca11b65007" xlink:to="loc_us-gaap_LongTermDebtCurrent_019cb451-70a5-7403-87ca-ce788db6a0b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019cb451-70a5-7832-8392-47cec3730403" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-70a5-7d37-af89-7fca11b65007" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019cb451-70a5-7832-8392-47cec3730403" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/DebtAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#DebtAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/DebtAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cb451-7175-7aca-9cc8-60b0b6c77ab4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cb451-7175-7aca-9cc8-60b0b6c77ab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-7aca-9cc8-60b0b6c77ab4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-7175-7aca-9cc8-60b0b6c77ab4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-7aca-9cc8-60b0b6c77ab4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-714f-8459-394444d58c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cb451-7175-7aca-9cc8-60b0b6c77ab4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-714f-8459-394444d58c5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5SeniorNotesDue2027Member_019cb451-7175-7b84-9ed1-c0c482190dfc" xlink:href="wms-20260331.xsd#wms_A5SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-714f-8459-394444d58c5f" xlink:to="loc_wms_A5SeniorNotesDue2027Member_019cb451-7175-7b84-9ed1-c0c482190dfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A6375SeniorNotesDue2030Member_019cb451-7175-7cd0-8fc2-8e17acf100a6" xlink:href="wms-20260331.xsd#wms_A6375SeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-714f-8459-394444d58c5f" xlink:to="loc_wms_A6375SeniorNotesDue2030Member_019cb451-7175-7cd0-8fc2-8e17acf100a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5.375SeniorNotesDue2034_019e089c-7890-719c-95d9-4eb301b0eb64" xlink:href="wms-20260331.xsd#wms_A5.375SeniorNotesDue2034"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-714f-8459-394444d58c5f" xlink:to="loc_wms_A5.375SeniorNotesDue2034_019e089c-7890-719c-95d9-4eb301b0eb64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CommercialLoanAgreementMember_019e1d34-95c1-7b3e-9cee-d4c93c566d8c" xlink:href="wms-20260331.xsd#wms_CommercialLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cb451-7175-714f-8459-394444d58c5f" xlink:to="loc_wms_CommercialLoanAgreementMember_019e1d34-95c1-7b3e-9cee-d4c93c566d8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cb451-7175-7dff-bc98-27898c5a0a9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cb451-7175-7dff-bc98-27898c5a0a9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7dff-bc98-27898c5a0a9b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cb451-7175-7dff-bc98-27898c5a0a9b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7dff-bc98-27898c5a0a9b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7ffd-9a7f-701f674496a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cb451-7175-7dff-bc98-27898c5a0a9b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7ffd-9a7f-701f674496a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BridgeLoanMember_019cb451-7175-7cc7-b784-b3fa356e3187" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BridgeLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7ffd-9a7f-701f674496a1" xlink:to="loc_us-gaap_BridgeLoanMember_019cb451-7175-7cc7-b784-b3fa356e3187" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TermLoanFacilityMember_019cb451-7175-7719-9aa9-178dbb9b032f" xlink:href="wms-20260331.xsd#wms_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7ffd-9a7f-701f674496a1" xlink:to="loc_wms_TermLoanFacilityMember_019cb451-7175-7719-9aa9-178dbb9b032f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_EquipmentFinancingMember_019cb451-7175-77c3-a06a-07c878a91828" xlink:href="wms-20260331.xsd#wms_EquipmentFinancingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7ffd-9a7f-701f674496a1" xlink:to="loc_wms_EquipmentFinancingMember_019cb451-7175-77c3-a06a-07c878a91828" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019e089c-7890-72e0-bad6-14c6860973b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cb451-7175-7ffd-9a7f-701f674496a1" xlink:to="loc_us-gaap_SeniorNotesMember_019e089c-7890-72e0-bad6-14c6860973b8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019cb451-7175-7674-baa8-33cb2a009c1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:to="loc_us-gaap_CreditFacilityAxis_019cb451-7175-7674-baa8-33cb2a009c1d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cb451-7175-7674-baa8-33cb2a009c1d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019cb451-7175-7674-baa8-33cb2a009c1d" xlink:to="loc_us-gaap_CreditFacilityDomain_019cb451-7175-7674-baa8-33cb2a009c1d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cb451-7175-756b-9771-b57a184b2ba9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019cb451-7175-7674-baa8-33cb2a009c1d" xlink:to="loc_us-gaap_CreditFacilityDomain_019cb451-7175-756b-9771-b57a184b2ba9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-7175-7112-ab6b-70a25b605a8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-7175-756b-9771-b57a184b2ba9" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019cb451-7175-7112-ab6b-70a25b605a8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SublimitOfRevolvingCreditFacilityMember_019cb451-7175-73d2-8b24-951c73206686" xlink:href="wms-20260331.xsd#wms_SublimitOfRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-7175-756b-9771-b57a184b2ba9" xlink:to="loc_wms_SublimitOfRevolvingCreditFacilityMember_019cb451-7175-73d2-8b24-951c73206686" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_A5SeniorNotesDue2027Member_019e08bc-d545-77cd-85e7-0b7069d54c25" xlink:href="wms-20260331.xsd#wms_A5SeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-7175-756b-9771-b57a184b2ba9" xlink:to="loc_wms_A5SeniorNotesDue2027Member_019e08bc-d545-77cd-85e7-0b7069d54c25" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CommercialLoanAgreementMember_019e1d30-c574-7114-bad0-a5a95cfd8a56" xlink:href="wms-20260331.xsd#wms_CommercialLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cb451-7175-756b-9771-b57a184b2ba9" xlink:to="loc_wms_CommercialLoanAgreementMember_019e1d30-c574-7114-bad0-a5a95cfd8a56" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019cb451-7175-77ab-8427-25b7902c8907" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:to="loc_us-gaap_VariableRateAxis_019cb451-7175-77ab-8427-25b7902c8907" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019cb451-7175-77ab-8427-25b7902c8907_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019cb451-7175-77ab-8427-25b7902c8907" xlink:to="loc_us-gaap_VariableRateDomain_019cb451-7175-77ab-8427-25b7902c8907_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019cb451-7175-79a8-b5ed-a100c5df4ecc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019cb451-7175-77ab-8427-25b7902c8907" xlink:to="loc_us-gaap_VariableRateDomain_019cb451-7175-79a8-b5ed-a100c5df4ecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TermBenchmarkBasedLoansRateMember_019cb451-7175-7e2c-86d0-6f587bed4b78" xlink:href="wms-20260331.xsd#wms_TermBenchmarkBasedLoansRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019cb451-7175-79a8-b5ed-a100c5df4ecc" xlink:to="loc_wms_TermBenchmarkBasedLoansRateMember_019cb451-7175-7e2c-86d0-6f587bed4b78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019e3dee-2ba5-75d7-9c58-0291cccc46e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019cb451-7175-79a8-b5ed-a100c5df4ecc" xlink:to="loc_us-gaap_BaseRateMember_019e3dee-2ba5-75d7-9c58-0291cccc46e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-7175-7fd0-b8c3-ed287f6de031" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:to="loc_srt_RangeAxis_019cb451-7175-7fd0-b8c3-ed287f6de031" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7fd0-b8c3-ed287f6de031_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-7175-7fd0-b8c3-ed287f6de031" xlink:to="loc_srt_RangeMember_019cb451-7175-7fd0-b8c3-ed287f6de031_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-74c1-98b8-72ac8efc5246" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-7175-7fd0-b8c3-ed287f6de031" xlink:to="loc_srt_RangeMember_019cb451-7175-74c1-98b8-72ac8efc5246" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-7175-7e29-8551-da1f3d777caa" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-74c1-98b8-72ac8efc5246" xlink:to="loc_srt_MinimumMember_019cb451-7175-7e29-8551-da1f3d777caa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-7175-7704-a710-61d7649ac141" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-74c1-98b8-72ac8efc5246" xlink:to="loc_srt_MaximumMember_019cb451-7175-7704-a710-61d7649ac141" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019cb451-7175-7143-8bce-a998c639baa0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cb451-7175-76a2-a517-d66f5e090bd3" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019cb451-7175-7143-8bce-a998c639baa0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019cb451-7175-7143-8bce-a998c639baa0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019cb451-7175-7143-8bce-a998c639baa0" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019cb451-7175-7143-8bce-a998c639baa0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019cb451-7175-7de2-9714-ba571c7d25de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019cb451-7175-7143-8bce-a998c639baa0" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019cb451-7175-7de2-9714-ba571c7d25de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019cb451-7175-7642-b730-7f9444dfef53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019cb451-7175-7de2-9714-ba571c7d25de" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019cb451-7175-7642-b730-7f9444dfef53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019cb451-7175-78ba-bad6-9f68a3f5de00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019cb451-7175-78ba-bad6-9f68a3f5de00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cb451-7175-7341-8a52-0baf4ba92367" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cb451-7175-7341-8a52-0baf4ba92367" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_019cb451-7175-7733-8cc4-85f971510f89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_019cb451-7175-7733-8cc4-85f971510f89" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_019cb451-7175-7837-90a0-ba7bde95875a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_019cb451-7175-7837-90a0-ba7bde95875a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cb451-7175-782f-ac71-05c2c951cb7c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cb451-7175-782f-ac71-05c2c951cb7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019cb451-7175-754f-ba8a-62de3bfa2899" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentTerm_019cb451-7175-754f-ba8a-62de3bfa2899" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019cb451-7175-7146-8866-2d401e8b2a68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019cb451-7175-7146-8866-2d401e8b2a68" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019cb451-7175-7d4d-85d6-557f6db7c562" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019cb451-7175-7d4d-85d6-557f6db7c562" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DebtInstrumentCovenantLeverageRatioMinimumForVariableRateStepDown_019e3df3-96ff-7383-be55-57187d1a467c" xlink:href="wms-20260331.xsd#wms_DebtInstrumentCovenantLeverageRatioMinimumForVariableRateStepDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_wms_DebtInstrumentCovenantLeverageRatioMinimumForVariableRateStepDown_019e3df3-96ff-7383-be55-57187d1a467c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DebtInstrumentCovenantLeverageRatioMaximumForVariableRateStepDown_019cb451-7175-7ba5-a336-de3a0a9565e6" xlink:href="wms-20260331.xsd#wms_DebtInstrumentCovenantLeverageRatioMaximumForVariableRateStepDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_wms_DebtInstrumentCovenantLeverageRatioMaximumForVariableRateStepDown_019cb451-7175-7ba5-a336-de3a0a9565e6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DebtInstrumentCovenantMaximumAmount_019e3e08-eed4-7454-b013-1abb3e5f9752" xlink:href="wms-20260331.xsd#wms_DebtInstrumentCovenantMaximumAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_wms_DebtInstrumentCovenantMaximumAmount_019e3e08-eed4-7454-b013-1abb3e5f9752" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DebtInstrumentCovenantRatioOfConsolidatedEBITDA_019e3e08-eed4-765b-a94c-52a4f1247bc4" xlink:href="wms-20260331.xsd#wms_DebtInstrumentCovenantRatioOfConsolidatedEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_wms_DebtInstrumentCovenantRatioOfConsolidatedEBITDA_019e3e08-eed4-765b-a94c-52a4f1247bc4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019cb451-7175-7835-a933-e062f9adba56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019cb451-7175-7835-a933-e062f9adba56" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019cb451-7175-76ec-97cd-f09e1142c77d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019cb451-7175-76ec-97cd-f09e1142c77d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_019cb451-7175-763c-9b75-8f5829fe2856" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_019cb451-7175-763c-9b75-8f5829fe2856" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019cb451-7175-7fd7-a3bd-80992ca28921" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_LongTermDebtCurrent_019cb451-7175-7fd7-a3bd-80992ca28921" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019cb451-7175-7f63-bed4-51102905c23a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019cb451-7175-7f63-bed4-51102905c23a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemedExcludingMakeWholePremium_019cb451-7175-7f85-a83c-b69d24d9b21c" xlink:href="wms-20260331.xsd#wms_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemedExcludingMakeWholePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_wms_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemedExcludingMakeWholePremium_019cb451-7175-7f85-a83c-b69d24d9b21c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019cb451-7175-78c8-a1e9-712b20a6a90e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019cb451-7175-78c8-a1e9-712b20a6a90e" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019cb451-7175-7f7d-b148-8fc256e094e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019cb451-7175-7f7d-b148-8fc256e094e4" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019e089b-fb3e-7c8a-bf68-41aca97eddbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019e089b-fb3e-7c8a-bf68-41aca97eddbf" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_019e08bf-807c-7687-a9a5-10e17657164e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cb451-7175-77cd-99b3-aa025434ef40" xlink:to="loc_us-gaap_RepaymentsOfDebt_019e08bf-807c-7687-a9a5-10e17657164e" xlink:type="arc" order="21"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/EmployeeBenefitPlansAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#EmployeeBenefitPlansAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/EmployeeBenefitPlansAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresLineItems_019cb451-7175-7235-8bd7-8030b583f151" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeStockOwnershipPlanESOPDisclosuresTable_019cb451-7175-755d-ab0c-a651806ceacc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeStockOwnershipPlanESOPDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresLineItems_019cb451-7175-7235-8bd7-8030b583f151" xlink:to="loc_us-gaap_ScheduleOfEmployeeStockOwnershipPlanESOPDisclosuresTable_019cb451-7175-755d-ab0c-a651806ceacc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019cb451-7175-7c1c-aced-49b57b808dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeStockOwnershipPlanESOPDisclosuresTable_019cb451-7175-755d-ab0c-a651806ceacc" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019cb451-7175-7c1c-aced-49b57b808dd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cb451-7175-7c1c-aced-49b57b808dd6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019cb451-7175-7c1c-aced-49b57b808dd6" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cb451-7175-7c1c-aced-49b57b808dd6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cb451-7175-7891-bd96-f1fe2dd1a699" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019cb451-7175-7c1c-aced-49b57b808dd6" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cb451-7175-7891-bd96-f1fe2dd1a699" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredProfitSharingMember_019cb451-7175-758a-9560-371d46d2cbdd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredProfitSharingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cb451-7175-7891-bd96-f1fe2dd1a699" xlink:to="loc_us-gaap_DeferredProfitSharingMember_019cb451-7175-758a-9560-371d46d2cbdd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_019cb451-7175-78f0-8db3-a1d7bc4dbde8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresLineItems_019cb451-7175-7235-8bd7-8030b583f151" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_019cb451-7175-78f0-8db3-a1d7bc4dbde8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_019cb451-7175-7eca-9521-18ee43dd301a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresLineItems_019cb451-7175-7235-8bd7-8030b583f151" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_019cb451-7175-7eca-9521-18ee43dd301a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofStockbasedCompensationExpenseDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensationSummaryofStockbasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofStockbasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-79c3-8597-f086ef3eeb7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-700e-b67b-50c125afa5ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-79c3-8597-f086ef3eeb7a" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-700e-b67b-50c125afa5ca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cb451-7175-7881-b247-79c24c461af2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-700e-b67b-50c125afa5ca" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cb451-7175-7881-b247-79c24c461af2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cb451-7175-7881-b247-79c24c461af2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cb451-7175-7881-b247-79c24c461af2" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cb451-7175-7881-b247-79c24c461af2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cb451-7175-70ae-9af8-844be0ed95c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cb451-7175-7881-b247-79c24c461af2" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cb451-7175-70ae-9af8-844be0ed95c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cb451-7175-7eff-beff-0acc59a41b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb451-7175-70ae-9af8-844be0ed95c0" xlink:to="loc_us-gaap_CostOfSalesMember_019cb451-7175-7eff-beff-0acc59a41b9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cb451-7175-737e-9072-45d1ac047327" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb451-7175-70ae-9af8-844be0ed95c0" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cb451-7175-737e-9072-45d1ac047327" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cb451-7175-7bf5-927e-023d51d4cd6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-700e-b67b-50c125afa5ca" xlink:to="loc_us-gaap_AwardTypeAxis_019cb451-7175-7bf5-927e-023d51d4cd6d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7bf5-927e-023d51d4cd6d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7bf5-927e-023d51d4cd6d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7bf5-927e-023d51d4cd6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7489-9e5a-7f1ca060c4fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7bf5-927e-023d51d4cd6d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7489-9e5a-7f1ca060c4fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_EquityClassifiedStockOptionsMember_019cb451-7175-7ad6-bac1-c24bf045a310" xlink:href="wms-20260331.xsd#wms_EquityClassifiedStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7489-9e5a-7f1ca060c4fe" xlink:to="loc_wms_EquityClassifiedStockOptionsMember_019cb451-7175-7ad6-bac1-c24bf045a310" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019cb451-7175-77a8-96ca-9dad25246285" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7489-9e5a-7f1ca060c4fe" xlink:to="loc_us-gaap_RestrictedStockMember_019cb451-7175-77a8-96ca-9dad25246285" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7afa-8955-0a8d0300fecc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7489-9e5a-7f1ca060c4fe" xlink:to="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7afa-8955-0a8d0300fecc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019cb451-7175-71fc-8a76-bf0dd640641c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7489-9e5a-7f1ca060c4fe" xlink:to="loc_us-gaap_EmployeeStockMember_019cb451-7175-71fc-8a76-bf0dd640641c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cb451-7175-746e-9a8e-b9b382e7505d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-700e-b67b-50c125afa5ca" xlink:to="loc_us-gaap_PlanNameAxis_019cb451-7175-746e-9a8e-b9b382e7505d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-746e-9a8e-b9b382e7505d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-746e-9a8e-b9b382e7505d" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-746e-9a8e-b9b382e7505d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7bf9-80cc-30ccce280ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-746e-9a8e-b9b382e7505d" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7bf9-80cc-30ccce280ab0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_NonEmployeeDirectorCompensationPlanMember_019cb451-7175-7b67-af64-c1714feb9193" xlink:href="wms-20260331.xsd#wms_NonEmployeeDirectorCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7bf9-80cc-30ccce280ab0" xlink:to="loc_wms_NonEmployeeDirectorCompensationPlanMember_019cb451-7175-7b67-af64-c1714feb9193" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cb451-7175-70cf-9815-f54ee16592f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-79c3-8597-f086ef3eeb7a" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cb451-7175-70cf-9815-f54ee16592f7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofAssumptionUsedinEstimateFairValueofStockOptionsDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensationSummaryofAssumptionUsedinEstimateFairValueofStockOptionsDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofAssumptionUsedinEstimateFairValueofStockOptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-7476-9133-ea9e524120f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-7476-9133-ea9e524120f6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-7175-75a5-9c88-75d8b21d6f87" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019cb451-7175-7476-9133-ea9e524120f6" xlink:to="loc_srt_RangeAxis_019cb451-7175-75a5-9c88-75d8b21d6f87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-75a5-9c88-75d8b21d6f87_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-7175-75a5-9c88-75d8b21d6f87" xlink:to="loc_srt_RangeMember_019cb451-7175-75a5-9c88-75d8b21d6f87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7cb9-98e9-9bbdee70dc44" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-7175-75a5-9c88-75d8b21d6f87" xlink:to="loc_srt_RangeMember_019cb451-7175-7cb9-98e9-9bbdee70dc44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-7175-74c0-83cf-0fa1c978719b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-7cb9-98e9-9bbdee70dc44" xlink:to="loc_srt_MinimumMember_019cb451-7175-74c0-83cf-0fa1c978719b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-7175-70bb-a536-a62d9f3a735d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-7cb9-98e9-9bbdee70dc44" xlink:to="loc_srt_MaximumMember_019cb451-7175-70bb-a536-a62d9f3a735d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_019cb451-7175-77b7-8ca8-ca4d2a308248" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_SharePrice_019cb451-7175-77b7-8ca8-ca4d2a308248" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019cb451-7175-727d-8a93-3b1bb602a739" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019cb451-7175-727d-8a93-3b1bb602a739" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_019cb451-7175-72a1-aa6c-4cdaf0dbee37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_019cb451-7175-72a1-aa6c-4cdaf0dbee37" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019cb451-7175-701f-9f48-31e4c3938911" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019cb451-7175-701f-9f48-31e4c3938911" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_019cb451-7175-7687-947f-6107c9d56d8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_019cb451-7175-7687-947f-6107c9d56d8a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019cb451-7175-7051-b59b-151802dab977" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019cb451-7175-7051-b59b-151802dab977" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019cb451-7175-729f-bcaf-184fe93b73fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019cb451-7175-7542-9fba-a39b27e65040" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019cb451-7175-729f-bcaf-184fe93b73fd" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensation2017OmnibusPlanDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensation2017OmnibusPlanDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensation2017OmnibusPlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-77f7-8f0f-fe8d83ae9af5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-77f7-8f0f-fe8d83ae9af5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-7175-7fdd-9ca9-af5c407232c0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-77f7-8f0f-fe8d83ae9af5" xlink:to="loc_srt_RangeAxis_019cb451-7175-7fdd-9ca9-af5c407232c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7fdd-9ca9-af5c407232c0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-7175-7fdd-9ca9-af5c407232c0" xlink:to="loc_srt_RangeMember_019cb451-7175-7fdd-9ca9-af5c407232c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-794c-bb70-8bc914893716" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-7175-7fdd-9ca9-af5c407232c0" xlink:to="loc_srt_RangeMember_019cb451-7175-794c-bb70-8bc914893716" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-7175-7a7f-8ebd-4e6782062c0c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-794c-bb70-8bc914893716" xlink:to="loc_srt_MaximumMember_019cb451-7175-7a7f-8ebd-4e6782062c0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cb451-7175-7c7f-9abb-e854b3a6d600" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-77f7-8f0f-fe8d83ae9af5" xlink:to="loc_us-gaap_PlanNameAxis_019cb451-7175-7c7f-9abb-e854b3a6d600" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7c7f-9abb-e854b3a6d600_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7c7f-9abb-e854b3a6d600" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7c7f-9abb-e854b3a6d600_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7036-8efe-9dd74471d70f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7c7f-9abb-e854b3a6d600" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7036-8efe-9dd74471d70f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-7334-a760-a31f2a76153b" xlink:href="wms-20260331.xsd#wms_TwoThousandSeventeenOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7036-8efe-9dd74471d70f" xlink:to="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-7334-a760-a31f2a76153b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cb451-7175-73f1-8ce4-9c0d246f660c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-77f7-8f0f-fe8d83ae9af5" xlink:to="loc_us-gaap_AwardTypeAxis_019cb451-7175-73f1-8ce4-9c0d246f660c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-73f1-8ce4-9c0d246f660c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-73f1-8ce4-9c0d246f660c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-73f1-8ce4-9c0d246f660c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-76d4-a1f5-655c9b0ee49e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-73f1-8ce4-9c0d246f660c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-76d4-a1f5-655c9b0ee49e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019cb451-7175-72b0-87c8-f4d5783f439e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-76d4-a1f5-655c9b0ee49e" xlink:to="loc_us-gaap_RestrictedStockMember_019cb451-7175-72b0-87c8-f4d5783f439e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7d57-ad98-641a81ce48f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-76d4-a1f5-655c9b0ee49e" xlink:to="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7d57-ad98-641a81ce48f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PerformanceSharesBasedOnReturnOnInvestedCapitalMember_019cb451-7175-7ba2-9af1-0e1e3186af7f" xlink:href="wms-20260331.xsd#wms_PerformanceSharesBasedOnReturnOnInvestedCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7d57-ad98-641a81ce48f4" xlink:to="loc_wms_PerformanceSharesBasedOnReturnOnInvestedCapitalMember_019cb451-7175-7ba2-9af1-0e1e3186af7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PerformanceSharesBasedOnFreeCashFlowOrCashFlowFromOperationsMember_019cb451-7175-73e4-9610-b4727e776d4e" xlink:href="wms-20260331.xsd#wms_PerformanceSharesBasedOnFreeCashFlowOrCashFlowFromOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7d57-ad98-641a81ce48f4" xlink:to="loc_wms_PerformanceSharesBasedOnFreeCashFlowOrCashFlowFromOperationsMember_019cb451-7175-73e4-9610-b4727e776d4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019cb451-7175-72ac-b491-973add59734b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019cb451-7175-72ac-b491-973add59734b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019cb451-7175-71d9-bc2f-95ed85485c33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019cb451-7175-71d9-bc2f-95ed85485c33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019cb451-7175-74c5-af54-c1f6938b4dfd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019cb451-7175-74c5-af54-c1f6938b4dfd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019cb451-7175-795c-8fde-8543f4f7cf16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019cb451-7175-795c-8fde-8543f4f7cf16" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019cb451-7175-71c1-93eb-c73807b49fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019cb451-7175-71c1-93eb-c73807b49fc7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019cb451-7175-7fb3-9576-3fbebabf75cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019cb451-7175-7fb3-9576-3fbebabf75cf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019cb451-7175-71cb-b83a-704e5acffd80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019cb451-7175-71cb-b83a-704e5acffd80" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019cb451-7175-70dd-abb0-2bf5a3fa86de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019cb451-7175-70dd-abb0-2bf5a3fa86de" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_019cb451-7175-7d75-ab6c-86fe97673a8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_019cb451-7175-7d75-ab6c-86fe97673a8e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOtherThanOptionsGrantsInPeriodPercentage_019cb451-7175-75ca-862e-f525e13afb75" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOtherThanOptionsGrantsInPeriodPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardsEquityInstrumentsOtherThanOptionsGrantsInPeriodPercentage_019cb451-7175-75ca-862e-f525e13afb75" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PerformanceAwardsPerformancePeriod_019cb451-7175-7021-88e9-3c6743a05ea2" xlink:href="wms-20260331.xsd#wms_PerformanceAwardsPerformancePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_wms_PerformanceAwardsPerformancePeriod_019cb451-7175-7021-88e9-3c6743a05ea2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cb451-7175-73e1-a875-dc6be2acdbc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b4d-b7de-87879d48f517" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cb451-7175-73e1-a875-dc6be2acdbc7" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofUnvestedRestrictedStockGrantsDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensationSummaryofUnvestedRestrictedStockGrantsDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofUnvestedRestrictedStockGrantsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7a6d-9f8e-2bf125601e64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7e20-a3f9-ff9f8b712089" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7a6d-9f8e-2bf125601e64" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7e20-a3f9-ff9f8b712089" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cb451-7175-7a1e-9cee-0953e9c3a37b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7e20-a3f9-ff9f8b712089" xlink:to="loc_us-gaap_PlanNameAxis_019cb451-7175-7a1e-9cee-0953e9c3a37b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7a1e-9cee-0953e9c3a37b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7a1e-9cee-0953e9c3a37b" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7a1e-9cee-0953e9c3a37b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7197-8494-c2853c775c75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7a1e-9cee-0953e9c3a37b" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7197-8494-c2853c775c75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-788e-8d9d-5c29c627c1cf" xlink:href="wms-20260331.xsd#wms_TwoThousandSeventeenOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7197-8494-c2853c775c75" xlink:to="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-788e-8d9d-5c29c627c1cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cb451-7175-7339-bf37-a5071cba1bba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7e20-a3f9-ff9f8b712089" xlink:to="loc_us-gaap_AwardTypeAxis_019cb451-7175-7339-bf37-a5071cba1bba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7339-bf37-a5071cba1bba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7339-bf37-a5071cba1bba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7339-bf37-a5071cba1bba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7015-93e1-2ec0f5522825" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7339-bf37-a5071cba1bba" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7015-93e1-2ec0f5522825" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019cb451-7175-7797-bdad-da5bad576023" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7015-93e1-2ec0f5522825" xlink:to="loc_us-gaap_RestrictedStockMember_019cb451-7175-7797-bdad-da5bad576023" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7b79-abe3-05e77565770c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7a6d-9f8e-2bf125601e64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7b79-abe3-05e77565770c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019cb451-7175-7e3e-b9a8-2492fbe62792" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7b79-abe3-05e77565770c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019cb451-7175-7e3e-b9a8-2492fbe62792" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cb451-7175-7fbb-85b8-0ca6221f474a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7b79-abe3-05e77565770c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cb451-7175-7fbb-85b8-0ca6221f474a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019cb451-7175-715d-b722-bfcdf3fd72f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7b79-abe3-05e77565770c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019cb451-7175-715d-b722-bfcdf3fd72f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019cb451-7175-726f-8a83-b71c8fd1e6fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7b79-abe3-05e77565770c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019cb451-7175-726f-8a83-b71c8fd1e6fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019cb451-7175-7066-96bd-618167c95c80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-704a-b2b4-4cb3462fd538" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7a6d-9f8e-2bf125601e64" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-704a-b2b4-4cb3462fd538" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019cb451-7175-7d35-bd7a-e9a24fad3cf9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-704a-b2b4-4cb3462fd538" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019cb451-7175-7d35-bd7a-e9a24fad3cf9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-7b17-ab6a-639f9a64de03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-704a-b2b4-4cb3462fd538" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-7b17-ab6a-639f9a64de03" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-7485-a161-963c1bfcea66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-704a-b2b4-4cb3462fd538" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-7485-a161-963c1bfcea66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019cb451-7175-7057-ab34-04526309df74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-704a-b2b4-4cb3462fd538" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019cb451-7175-7057-ab34-04526309df74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019cb451-7175-77be-b025-b28584c5cc00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensationScheduleofStockOptionActivityDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensationScheduleofStockOptionActivityDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensationScheduleofStockOptionActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7baf-b125-773e80042b5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7268-bc26-e2f45ef4e730" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7baf-b125-773e80042b5f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7268-bc26-e2f45ef4e730" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cb451-7175-7575-8465-3c658883c377" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7268-bc26-e2f45ef4e730" xlink:to="loc_us-gaap_PlanNameAxis_019cb451-7175-7575-8465-3c658883c377" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7575-8465-3c658883c377_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7575-8465-3c658883c377" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7575-8465-3c658883c377_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7904-b390-352a59dea3f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7575-8465-3c658883c377" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7904-b390-352a59dea3f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-7a73-9fc1-368b8409a6c8" xlink:href="wms-20260331.xsd#wms_TwoThousandSeventeenOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7904-b390-352a59dea3f8" xlink:to="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-7a73-9fc1-368b8409a6c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TwoThousandThirteenStockOptionPlanMember_019cb451-7175-7201-9c24-88ae915c8819" xlink:href="wms-20260331.xsd#wms_TwoThousandThirteenStockOptionPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7904-b390-352a59dea3f8" xlink:to="loc_wms_TwoThousandThirteenStockOptionPlanMember_019cb451-7175-7201-9c24-88ae915c8819" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7baf-b125-773e80042b5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019cb451-7175-7be3-9bea-0ca7602d2163" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019cb451-7175-7be3-9bea-0ca7602d2163" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019cb451-7175-72fd-a826-d38336ca4583" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019cb451-7175-72fd-a826-d38336ca4583" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cb451-7175-7a66-842a-4572d287fd09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cb451-7175-7a66-842a-4572d287fd09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019cb451-7175-7052-9862-fb25c41211f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019cb451-7175-7052-9862-fb25c41211f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019cb451-7175-7277-9836-8abac9986010" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_019cb451-7175-77b5-810e-1c2c501715d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_019cb451-7175-77b5-810e-1c2c501715d9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_019cb451-7175-7e0a-9466-611d0b35f064" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_019cb451-7175-7e0a-9466-611d0b35f064" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_019cb451-7175-76b5-b31f-0c60ff410f2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019cb451-7175-739a-bd63-cee1b52610e8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_019cb451-7175-76b5-b31f-0c60ff410f2a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7baf-b125-773e80042b5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019cb451-7175-7f27-9a7f-435e370d3eb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019cb451-7175-7f27-9a7f-435e370d3eb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019cb451-7175-7923-ae16-72e434075f33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019cb451-7175-7923-ae16-72e434075f33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019cb451-7175-7e9e-bf6c-8400ea7f6e59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019cb451-7175-7e9e-bf6c-8400ea7f6e59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019cb451-7175-7542-8531-216d1f690b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019cb451-7175-7542-8531-216d1f690b1d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019cb451-7175-778f-9bb6-a15cb3a871f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableAndVestedWeightedAverageExercisePrice_019cb451-7175-7167-90d7-da21f089b2aa" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableAndVestedWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableAndVestedWeightedAverageExercisePrice_019cb451-7175-7167-90d7-da21f089b2aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedSharesWeightedAverageExercisePrice_019cb451-7175-7d2e-bc41-513f05ae7648" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedSharesWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedSharesWeightedAverageExercisePrice_019cb451-7175-7d2e-bc41-513f05ae7648" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_019cb451-7175-7a0b-8131-ca2f971c0099" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019cb451-7175-734e-9c57-1a781ba07925" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_019cb451-7175-7a0b-8131-ca2f971c0099" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019cb451-7175-7c23-8ece-29aa3f781653" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7baf-b125-773e80042b5f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019cb451-7175-7c23-8ece-29aa3f781653" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019cb451-7175-71b3-b03f-48c587d4991c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019cb451-7175-7c23-8ece-29aa3f781653" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019cb451-7175-71b3-b03f-48c587d4991c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_019cb451-7175-76a1-835c-3c184bfff4ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019cb451-7175-7c23-8ece-29aa3f781653" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_019cb451-7175-76a1-835c-3c184bfff4ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedWeightedAverageRemainingContractualTerm1_019cb451-7175-79be-9524-f066bcbd0d6b" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedWeightedAverageRemainingContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019cb451-7175-7c23-8ece-29aa3f781653" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedWeightedAverageRemainingContractualTerm1_019cb451-7175-79be-9524-f066bcbd0d6b" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofPerformanceUnitsGrantedDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensationSummaryofPerformanceUnitsGrantedDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensationSummaryofPerformanceUnitsGrantedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b68-94a1-4d8d63e7b133" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7432-8aad-bb30634c978f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b68-94a1-4d8d63e7b133" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7432-8aad-bb30634c978f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cb451-7175-7b40-9b23-f87d9ef9049f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7432-8aad-bb30634c978f" xlink:to="loc_us-gaap_AwardTypeAxis_019cb451-7175-7b40-9b23-f87d9ef9049f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7b40-9b23-f87d9ef9049f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7b40-9b23-f87d9ef9049f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7b40-9b23-f87d9ef9049f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7fe8-9517-f609a77ca833" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7b40-9b23-f87d9ef9049f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7fe8-9517-f609a77ca833" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7540-a1cf-5064b7e5bd11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7fe8-9517-f609a77ca833" xlink:to="loc_us-gaap_PerformanceSharesMember_019cb451-7175-7540-a1cf-5064b7e5bd11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cb451-7175-7db8-aeca-0251449299c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7432-8aad-bb30634c978f" xlink:to="loc_us-gaap_PlanNameAxis_019cb451-7175-7db8-aeca-0251449299c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7db8-aeca-0251449299c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7db8-aeca-0251449299c9" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7db8-aeca-0251449299c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7023-a7bc-e094606bfe93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7db8-aeca-0251449299c9" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7023-a7bc-e094606bfe93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-74e3-8ce9-a363737ebc19" xlink:href="wms-20260331.xsd#wms_TwoThousandSeventeenOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7023-a7bc-e094606bfe93" xlink:to="loc_wms_TwoThousandSeventeenOmnibusPlanMember_019cb451-7175-74e3-8ce9-a363737ebc19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b68-94a1-4d8d63e7b133" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019cb451-7175-7846-95ca-a57b0f6da53d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019cb451-7175-7846-95ca-a57b0f6da53d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cb451-7175-7d0d-90d8-c2b966b4992b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cb451-7175-7d0d-90d8-c2b966b4992b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedByPerformanceFactor_019cb451-7175-72cd-b57a-03c7cfb02195" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedByPerformanceFactor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedByPerformanceFactor_019cb451-7175-72cd-b57a-03c7cfb02195" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019cb451-7175-72a1-bd7f-cb05f0cc4ed0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019cb451-7175-72a1-bd7f-cb05f0cc4ed0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019cb451-7175-7a03-8607-3da08c3d18e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019cb451-7175-7824-afef-1166f9815608" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019cb451-7175-7a03-8607-3da08c3d18e5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019cb451-7175-7fb0-b214-2a63493d0f73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7b68-94a1-4d8d63e7b133" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019cb451-7175-7b1d-a869-8cefcc91b0be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019cb451-7175-7b1d-a869-8cefcc91b0be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-78aa-8124-5cc15e950e43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-78aa-8124-5cc15e950e43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedByPerformanceFactorWeightedAverageGrantDateFairValue_019cb451-7175-7ec8-a937-cf0b31a8143d" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedByPerformanceFactorWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAddedByPerformanceFactorWeightedAverageGrantDateFairValue_019cb451-7175-7ec8-a937-cf0b31a8143d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-7672-ba74-8c3ccd2e886d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019cb451-7175-7672-ba74-8c3ccd2e886d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019cb451-7175-7776-804d-debe72a93113" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019cb451-7175-7993-bc9b-12b2f9b2a3f7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019cb451-7175-7776-804d-debe72a93113" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019cb451-7175-7c55-a390-20127b6f3a20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/StockBasedCompensationStockOptionsDetails" xlink:type="simple" xlink:href="wms-20260331.xsd#StockBasedCompensationStockOptionsDetails"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/StockBasedCompensationStockOptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7cee-b793-8db8ee0003db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7cee-b793-8db8ee0003db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019cb451-7175-7c2a-94b6-ff834d4c4bf4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7cee-b793-8db8ee0003db" xlink:to="loc_srt_TitleOfIndividualAxis_019cb451-7175-7c2a-94b6-ff834d4c4bf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019cb451-7175-7c2a-94b6-ff834d4c4bf4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019cb451-7175-7c2a-94b6-ff834d4c4bf4" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019cb451-7175-7c2a-94b6-ff834d4c4bf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019cb451-7175-7308-927c-06f871cbe930" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019cb451-7175-7c2a-94b6-ff834d4c4bf4" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019cb451-7175-7308-927c-06f871cbe930" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ManagementMember_019cb451-7175-7f2e-b7fa-8f0129e4af8e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ManagementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019cb451-7175-7308-927c-06f871cbe930" xlink:to="loc_srt_ManagementMember_019cb451-7175-7f2e-b7fa-8f0129e4af8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cb451-7175-7f7c-be6e-e939c77d9b27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7cee-b793-8db8ee0003db" xlink:to="loc_us-gaap_AwardTypeAxis_019cb451-7175-7f7c-be6e-e939c77d9b27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7f7c-be6e-e939c77d9b27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7f7c-be6e-e939c77d9b27" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-7f7c-be6e-e939c77d9b27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-78ef-acb2-b0fbe0d514c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cb451-7175-7f7c-be6e-e939c77d9b27" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-78ef-acb2-b0fbe0d514c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_LiabilityClassifiedStockOptionsMember_019cb451-7175-7d73-a4c2-cf31af9e35ae" xlink:href="wms-20260331.xsd#wms_LiabilityClassifiedStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cb451-7175-78ef-acb2-b0fbe0d514c6" xlink:to="loc_wms_LiabilityClassifiedStockOptionsMember_019cb451-7175-7d73-a4c2-cf31af9e35ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cb451-7175-7a53-a2ee-ea82a14c7648" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7cee-b793-8db8ee0003db" xlink:to="loc_us-gaap_PlanNameAxis_019cb451-7175-7a53-a2ee-ea82a14c7648" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7a53-a2ee-ea82a14c7648_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7a53-a2ee-ea82a14c7648" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7a53-a2ee-ea82a14c7648_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cb451-7175-7be5-b6df-489e86b5039f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019cb451-7175-7a53-a2ee-ea82a14c7648" xlink:to="loc_us-gaap_PlanNameDomain_019cb451-7175-7be5-b6df-489e86b5039f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TwoThousandThirteenStockOptionPlanMember_019cb451-7175-72e4-b2af-6d95e2c2b6d2" xlink:href="wms-20260331.xsd#wms_TwoThousandThirteenStockOptionPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cb451-7175-7be5-b6df-489e86b5039f" xlink:to="loc_wms_TwoThousandThirteenStockOptionPlanMember_019cb451-7175-72e4-b2af-6d95e2c2b6d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-7175-7df5-af7f-92f651b8f680" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cb451-7175-7cee-b793-8db8ee0003db" xlink:to="loc_srt_RangeAxis_019cb451-7175-7df5-af7f-92f651b8f680" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7df5-af7f-92f651b8f680_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-7175-7df5-af7f-92f651b8f680" xlink:to="loc_srt_RangeMember_019cb451-7175-7df5-af7f-92f651b8f680_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7de1-bd80-654039baae06" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-7175-7df5-af7f-92f651b8f680" xlink:to="loc_srt_RangeMember_019cb451-7175-7de1-bd80-654039baae06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-7175-7e98-ae16-8a7267854516" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-7de1-bd80-654039baae06" xlink:to="loc_srt_MinimumMember_019cb451-7175-7e98-ae16-8a7267854516" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-7175-7912-a244-96725924c78b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-7de1-bd80-654039baae06" xlink:to="loc_srt_MaximumMember_019cb451-7175-7912-a244-96725924c78b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAnnualInstallments_019cb451-7175-7c6b-9b95-d9414f95d902" xlink:href="wms-20260331.xsd#wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAnnualInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_wms_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAnnualInstallments_019cb451-7175-7c6b-9b95-d9414f95d902" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019cb451-7175-7a8a-857f-2c68a8785a48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019cb451-7175-7a8a-857f-2c68a8785a48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019cb451-7175-7ccc-ad7f-e5745448cdb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019cb451-7175-7ccc-ad7f-e5745448cdb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019cb451-7175-745e-bb3d-fbcf975f354f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019cb451-7175-745e-bb3d-fbcf975f354f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019cb451-7175-7bf8-8bce-08abd0d6e918" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019cb451-7175-7bf8-8bce-08abd0d6e918" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019cb451-7175-76c8-ac72-22e35cd1e40a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019cb451-7175-76c8-ac72-22e35cd1e40a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_019cb451-7175-76a9-8f22-410ea75656eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cb451-7175-7dab-9120-ec83f4fe2567" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_019cb451-7175-76a9-8f22-410ea75656eb" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/IncomeTaxesNetDeferredTaxAssetsandLiabilitiesDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#IncomeTaxesNetDeferredTaxAssetsandLiabilitiesDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/IncomeTaxesNetDeferredTaxAssetsandLiabilitiesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wms_IncomeTaxesLineItems_019cb451-7175-76c8-a36a-cc8329594e35" xlink:href="wms-20260331.xsd#wms_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_IncomeTaxesTable_019cb451-7175-748a-809d-2a01de2fc079" xlink:href="wms-20260331.xsd#wms_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_wms_IncomeTaxesLineItems_019cb451-7175-76c8-a36a-cc8329594e35" xlink:to="loc_wms_IncomeTaxesTable_019cb451-7175-748a-809d-2a01de2fc079" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019cb451-7175-74ad-8d11-78cce1c95820" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_wms_IncomeTaxesTable_019cb451-7175-748a-809d-2a01de2fc079" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019cb451-7175-74ad-8d11-78cce1c95820" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cb451-7175-74ad-8d11-78cce1c95820_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cb451-7175-74ad-8d11-78cce1c95820" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cb451-7175-74ad-8d11-78cce1c95820_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cb451-7175-7789-8b28-e03d5345126d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cb451-7175-74ad-8d11-78cce1c95820" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cb451-7175-7789-8b28-e03d5345126d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_019cb451-7175-7130-826a-05c1663d38cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb451-7175-7789-8b28-e03d5345126d" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_019cb451-7175-7130-826a-05c1663d38cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019cb451-7175-7f18-9032-226f1b62c277" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_IncomeTaxesLineItems_019cb451-7175-76c8-a36a-cc8329594e35" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019cb451-7175-7f18-9032-226f1b62c277" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019cb451-7175-7974-9d39-0abbbbdb21d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_IncomeTaxesLineItems_019cb451-7175-76c8-a36a-cc8329594e35" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019cb451-7175-7974-9d39-0abbbbdb21d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_019cb451-7175-719a-a00c-2189d3055ef0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_wms_IncomeTaxesLineItems_019cb451-7175-76c8-a36a-cc8329594e35" xlink:to="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_019cb451-7175-719a-a00c-2189d3055ef0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/NetIncomePerShareandStockholdersEquitySummaryofNetIncomePerShareDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#NetIncomePerShareandStockholdersEquitySummaryofNetIncomePerShareDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/NetIncomePerShareandStockholdersEquitySummaryofNetIncomePerShareDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cb451-7175-743c-babd-88079ba7eda2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cb451-7175-781f-9337-c9a70a6e3fdf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cb451-7175-743c-babd-88079ba7eda2" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cb451-7175-781f-9337-c9a70a6e3fdf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cb451-7175-7d27-8371-4e51f065bda7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cb451-7175-781f-9337-c9a70a6e3fdf" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cb451-7175-7d27-8371-4e51f065bda7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-7d27-8371-4e51f065bda7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cb451-7175-7d27-8371-4e51f065bda7" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-7d27-8371-4e51f065bda7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-722d-89a8-a498b4d0a9c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cb451-7175-7d27-8371-4e51f065bda7" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-722d-89a8-a498b4d0a9c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_RestrictedStockNonparticipatingMember_019cb451-7175-781b-9dcc-0e278d3b6b84" xlink:href="wms-20260331.xsd#wms_RestrictedStockNonparticipatingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-722d-89a8-a498b4d0a9c0" xlink:to="loc_wms_RestrictedStockNonparticipatingMember_019cb451-7175-781b-9dcc-0e278d3b6b84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019cb451-7175-7557-bdbc-4721b9ae0a8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-722d-89a8-a498b4d0a9c0" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019cb451-7175-7557-bdbc-4721b9ae0a8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019cb451-7175-70a6-a99a-3b75bd26e356" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cb451-7175-722d-89a8-a498b4d0a9c0" xlink:to="loc_us-gaap_RestrictedStockMember_019cb451-7175-70a6-a99a-3b75bd26e356" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cb451-7175-743c-babd-88079ba7eda2" xlink:to="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_019e08ce-e963-70fa-b593-00a9ca045ef4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:to="loc_us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_019e08ce-e963-70fa-b593-00a9ca045ef4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_019e08cd-d25d-72bd-9960-a43b2bcbc455" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_019e08cd-d25d-72bd-9960-a43b2bcbc455" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb451-7175-7e4f-b2aa-d1f8423da538" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb451-7175-7e4f-b2aa-d1f8423da538" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_019e08d1-5c41-73e7-8bf1-c6e1030ca169" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_019e08d1-5c41-73e7-8bf1-c6e1030ca169" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_019e08d1-fed5-74e8-8144-49c019031c98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_019e08d1-fed5-74e8-8144-49c019031c98" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019cb451-7175-7243-95ce-271715def7f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_019cb451-7175-7359-a268-e72346501603" xlink:to="loc_us-gaap_EarningsPerShareBasic_019cb451-7175-7243-95ce-271715def7f0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cb451-7175-743c-babd-88079ba7eda2" xlink:to="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019cb451-7175-73f8-a52f-b7196bd48cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019cb451-7175-73f8-a52f-b7196bd48cb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb451-7175-7f8b-84b8-456b170003dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019cb451-7175-732f-8b49-b3dc8f871723" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019cb451-7175-732f-8b49-b3dc8f871723" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb451-7175-7b9f-8b08-f7a137007752" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb451-7175-7b9f-8b08-f7a137007752" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_019e08d1-a595-76fb-bcdc-0450aad90554" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_019e08d1-a595-76fb-bcdc-0450aad90554" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019cb451-7175-7598-9890-fdc18c3621fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019cb451-7175-7598-9890-fdc18c3621fe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_019e08d2-8337-7082-b8a4-b67d51cdfbcd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_019e08d2-8337-7082-b8a4-b67d51cdfbcd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019cb451-7175-7f04-a702-3f95593b090f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_019cb451-7175-7c5c-80ba-23a1aa9259cd" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019cb451-7175-7f04-a702-3f95593b090f" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/CommitmentsandContingenciesAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#CommitmentsandContingenciesAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/CommitmentsandContingenciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019cb451-7175-7080-b661-3ccda16017cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019cb451-7175-7a5d-bbe2-aa6e6caac664" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019cb451-7175-7080-b661-3ccda16017cd" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019cb451-7175-7a5d-bbe2-aa6e6caac664" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019cb451-7175-758e-a509-7511d4d45dd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019cb451-7175-7a5d-bbe2-aa6e6caac664" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019cb451-7175-758e-a509-7511d4d45dd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019cb451-7175-758e-a509-7511d4d45dd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019cb451-7175-758e-a509-7511d4d45dd0" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019cb451-7175-758e-a509-7511d4d45dd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019cb451-7175-7747-b513-6543d2909b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019cb451-7175-758e-a509-7511d4d45dd0" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019cb451-7175-7747-b513-6543d2909b6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoriesMember_019cb451-7175-7d07-bbc9-481df86bca01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019cb451-7175-7747-b513-6543d2909b6d" xlink:to="loc_us-gaap_InventoriesMember_019cb451-7175-7d07-bbc9-481df86bca01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb451-7175-7a6c-90aa-85ceccc1fd1c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentTable_019cb451-7175-7a5d-bbe2-aa6e6caac664" xlink:to="loc_srt_RangeAxis_019cb451-7175-7a6c-90aa-85ceccc1fd1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7a6c-90aa-85ceccc1fd1c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb451-7175-7a6c-90aa-85ceccc1fd1c" xlink:to="loc_srt_RangeMember_019cb451-7175-7a6c-90aa-85ceccc1fd1c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb451-7175-7807-8827-f98c53bd6b4e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb451-7175-7a6c-90aa-85ceccc1fd1c" xlink:to="loc_srt_RangeMember_019cb451-7175-7807-8827-f98c53bd6b4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb451-7175-7a36-b84f-e8817b448f2c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-7807-8827-f98c53bd6b4e" xlink:to="loc_srt_MinimumMember_019cb451-7175-7a36-b84f-e8817b448f2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb451-7175-79d2-8328-7de9307a52a3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb451-7175-7807-8827-f98c53bd6b4e" xlink:to="loc_srt_MaximumMember_019cb451-7175-79d2-8328-7de9307a52a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_PurchaseCommitmentContractPeriod_019cb451-7175-7821-8fe1-7a466811d664" xlink:href="wms-20260331.xsd#wms_PurchaseCommitmentContractPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019cb451-7175-7080-b661-3ccda16017cd" xlink:to="loc_wms_PurchaseCommitmentContractPeriod_019cb451-7175-7821-8fe1-7a466811d664" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_019cb451-7175-702b-9a38-c44c7feb987e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentLineItems_019cb451-7175-7080-b661-3ccda16017cd" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_019cb451-7175-702b-9a38-c44c7feb987e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BusinessSegmentInformationScheduleofRevenuefromReportableSegmentsbyProductTypeDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BusinessSegmentInformationScheduleofRevenuefromReportableSegmentsbyProductTypeDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BusinessSegmentInformationScheduleofRevenuefromReportableSegmentsbyProductTypeDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-742f-9d2a-850ae00c1996" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-742f-9d2a-850ae00c1996" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cb451-7175-7a69-b138-1ec788646565" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-742f-9d2a-850ae00c1996" xlink:to="loc_srt_ConsolidationItemsAxis_019cb451-7175-7a69-b138-1ec788646565" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb451-7175-7a69-b138-1ec788646565_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cb451-7175-7a69-b138-1ec788646565" xlink:to="loc_srt_ConsolidationItemsDomain_019cb451-7175-7a69-b138-1ec788646565_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb451-7175-7430-9c79-4430182c91c7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cb451-7175-7a69-b138-1ec788646565" xlink:to="loc_srt_ConsolidationItemsDomain_019cb451-7175-7430-9c79-4430182c91c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019cb451-7175-7134-a2f4-bafc10e7bd38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb451-7175-7430-9c79-4430182c91c7" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019cb451-7175-7134-a2f4-bafc10e7bd38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cb451-7175-7a42-8dd7-3991e1055605" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb451-7175-7430-9c79-4430182c91c7" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cb451-7175-7a42-8dd7-3991e1055605" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-75ae-ace3-494c74e4c946" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-742f-9d2a-850ae00c1996" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-75ae-ace3-494c74e4c946" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-7175-75ae-ace3-494c74e4c946_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-75ae-ace3-494c74e4c946" xlink:to="loc_us-gaap_SegmentDomain_019cb451-7175-75ae-ace3-494c74e4c946_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-7175-76bf-8997-a94140dbcc3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-75ae-ace3-494c74e4c946" xlink:to="loc_us-gaap_SegmentDomain_019cb451-7175-76bf-8997-a94140dbcc3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_StormwaterSegmentMember_019e08d6-dae2-7b01-bc67-1b5e17943892" xlink:href="wms-20260331.xsd#wms_StormwaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-76bf-8997-a94140dbcc3c" xlink:to="loc_wms_StormwaterSegmentMember_019e08d6-dae2-7b01-bc67-1b5e17943892" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_WastewaterSegmentMember_019e08d7-9466-7432-9e17-4cec9b5bda1e" xlink:href="wms-20260331.xsd#wms_WastewaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-76bf-8997-a94140dbcc3c" xlink:to="loc_wms_WastewaterSegmentMember_019e08d7-9466-7432-9e17-4cec9b5bda1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cb451-7175-7067-9480-f99581472338" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cb451-7175-7067-9480-f99581472338" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CostOfGoodsSoldExcludingEmployeeStockOptionPlanSpecialDividendCompensation_019cb451-7175-7e47-ae03-373b9f088568" xlink:href="wms-20260331.xsd#wms_CostOfGoodsSoldExcludingEmployeeStockOptionPlanSpecialDividendCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_wms_CostOfGoodsSoldExcludingEmployeeStockOptionPlanSpecialDividendCompensation_019cb451-7175-7e47-ae03-373b9f088568" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SellingGeneralAndAdministrativeAdjusted_019e08e0-2901-76b3-a50e-e16f110046c3" xlink:href="wms-20260331.xsd#wms_SellingGeneralAndAdministrativeAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_wms_SellingGeneralAndAdministrativeAdjusted_019e08e0-2901-76b3-a50e-e16f110046c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e08e0-5db4-792c-9d43-b0d82e81e833" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e08e0-5db4-792c-9d43-b0d82e81e833" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SegmentAdjustedEBITDA_019e08e0-c1d6-74bb-8cc0-d85b072cb247" xlink:href="wms-20260331.xsd#wms_SegmentAdjustedEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_wms_SegmentAdjustedEBITDA_019e08e0-c1d6-74bb-8cc0-d85b072cb247" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ConsolidatedAdjustedEBITDA_019e08ea-91c0-7baf-a9eb-3198239e4944" xlink:href="wms-20260331.xsd#wms_ConsolidatedAdjustedEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_wms_ConsolidatedAdjustedEBITDA_019e08ea-91c0-7baf-a9eb-3198239e4944" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e08ea-fe07-7751-a164-4f34dd1b0ac1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e08ea-fe07-7751-a164-4f34dd1b0ac1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_019e08eb-9a2a-7d61-9e85-3d0483b25b0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_InterestIncomeOther_019e08eb-9a2a-7d61-9e85-3d0483b25b0e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019e08ed-42ba-7082-9df2-19132225743a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_DepreciationAndAmortization_019e08ed-42ba-7082-9df2-19132225743a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash_019e08ed-8351-7a32-a99e-5934d8ddc219" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash_019e08ed-8351-7a32-a99e-5934d8ddc219" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfAssets_019e08ed-cb6a-733c-a942-35234bfb59eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnSalesOfAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_GainsLossesOnSalesOfAssets_019e08ed-cb6a-733c-a942-35234bfb59eb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TransactionCosts_019e08ee-3c16-72c7-b456-8cf4c462fead" xlink:href="wms-20260331.xsd#wms_TransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_wms_TransactionCosts_019e08ee-3c16-72c7-b456-8cf4c462fead" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OtherAdjustedEBITDAAdjustments_019e08ee-d253-7904-9bf5-5db5fccc4243" xlink:href="wms-20260331.xsd#wms_OtherAdjustedEBITDAAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_wms_OtherAdjustedEBITDAAdjustments_019e08ee-d253-7904-9bf5-5db5fccc4243" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e08ef-2d89-7112-b1a9-d53b39e28e24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e08ef-2d89-7112-b1a9-d53b39e28e24" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e08ef-98db-7af0-b2c6-c6cc700cf812" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e08ef-98db-7af0-b2c6-c6cc700cf812" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e08ef-f924-7d8c-930c-709ae9290d7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e08ef-f924-7d8c-930c-709ae9290d7a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019e08ef-f924-74d7-9838-84a2832e0931" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-73c7-8949-fbf91090fb82" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019e08ef-f924-74d7-9838-84a2832e0931" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BusinessSegmentInformationScheduleofFinancialInformationAttributabletoReportableSegmentsDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BusinessSegmentInformationScheduleofFinancialInformationAttributabletoReportableSegmentsDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BusinessSegmentInformationScheduleofFinancialInformationAttributabletoReportableSegmentsDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-760b-82c3-995214b45ba2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-760b-82c3-995214b45ba2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cb451-7175-7e46-a426-676c7f587786" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-760b-82c3-995214b45ba2" xlink:to="loc_srt_ConsolidationItemsAxis_019cb451-7175-7e46-a426-676c7f587786" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb451-7175-7e46-a426-676c7f587786_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cb451-7175-7e46-a426-676c7f587786" xlink:to="loc_srt_ConsolidationItemsDomain_019cb451-7175-7e46-a426-676c7f587786_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb451-7175-7399-84a9-6a2e0172b37d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cb451-7175-7e46-a426-676c7f587786" xlink:to="loc_srt_ConsolidationItemsDomain_019cb451-7175-7399-84a9-6a2e0172b37d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019cb451-7175-7b7e-8047-8c7df7645423" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb451-7175-7399-84a9-6a2e0172b37d" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019cb451-7175-7b7e-8047-8c7df7645423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cb451-7175-7c32-b8c2-6c6a402bcefc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb451-7175-7399-84a9-6a2e0172b37d" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cb451-7175-7c32-b8c2-6c6a402bcefc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-74f2-8a34-66072aac4a48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb451-7175-760b-82c3-995214b45ba2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-74f2-8a34-66072aac4a48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-7175-74f2-8a34-66072aac4a48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-74f2-8a34-66072aac4a48" xlink:to="loc_us-gaap_SegmentDomain_019cb451-7175-74f2-8a34-66072aac4a48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-7175-791e-a2ae-c88a3b0c0a4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-74f2-8a34-66072aac4a48" xlink:to="loc_us-gaap_SegmentDomain_019cb451-7175-791e-a2ae-c88a3b0c0a4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_StormwaterSegmentMember_019e08f0-7832-7194-964a-1fe702b40f49" xlink:href="wms-20260331.xsd#wms_StormwaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-791e-a2ae-c88a3b0c0a4a" xlink:to="loc_wms_StormwaterSegmentMember_019e08f0-7832-7194-964a-1fe702b40f49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_WastewaterSegmentMember_019e08f0-7832-75b2-ae01-8b6dda996807" xlink:href="wms-20260331.xsd#wms_WastewaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-791e-a2ae-c88a3b0c0a4a" xlink:to="loc_wms_WastewaterSegmentMember_019e08f0-7832-75b2-ae01-8b6dda996807" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e08f0-7832-7b97-9317-b294a693fe53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e08f0-7832-7b97-9317-b294a693fe53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CostOfGoodsSoldExcludingEmployeeStockOptionPlanSpecialDividendCompensation_019e08f0-7832-7c89-a4ab-fb7be54e9961" xlink:href="wms-20260331.xsd#wms_CostOfGoodsSoldExcludingEmployeeStockOptionPlanSpecialDividendCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_CostOfGoodsSoldExcludingEmployeeStockOptionPlanSpecialDividendCompensation_019e08f0-7832-7c89-a4ab-fb7be54e9961" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SellingGeneralAndAdministrativeExpenseExcludingEmployeeStockOptionPlanSpecialDividendCompensation_019e08f0-7832-70f0-9fab-91ce07cddcdd" xlink:href="wms-20260331.xsd#wms_SellingGeneralAndAdministrativeExpenseExcludingEmployeeStockOptionPlanSpecialDividendCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_SellingGeneralAndAdministrativeExpenseExcludingEmployeeStockOptionPlanSpecialDividendCompensation_019e08f0-7832-70f0-9fab-91ce07cddcdd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e08f0-7832-7c35-8de7-fc1295b5e3d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e08f0-7832-7c35-8de7-fc1295b5e3d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SegmentAdjustedEBITDA_019e08f0-7832-7b13-bcd9-84af63ead755" xlink:href="wms-20260331.xsd#wms_SegmentAdjustedEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_SegmentAdjustedEBITDA_019e08f0-7832-7b13-bcd9-84af63ead755" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_CorporateAndOtherAdjusted_019e45df-c3c8-711d-8d1e-6450d9a2810c" xlink:href="wms-20260331.xsd#wms_CorporateAndOtherAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_CorporateAndOtherAdjusted_019e45df-c3c8-711d-8d1e-6450d9a2810c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_ConsolidatedAdjustedEBITDA_019e08f0-7832-7d6f-83c1-d039f6ea2fb3" xlink:href="wms-20260331.xsd#wms_ConsolidatedAdjustedEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_ConsolidatedAdjustedEBITDA_019e08f0-7832-7d6f-83c1-d039f6ea2fb3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e08f1-3f73-78e5-9c72-54a47655ae14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e08f1-3f73-78e5-9c72-54a47655ae14" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_019e08f1-3f73-707c-b729-21448d82d768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_InterestIncomeOther_019e08f1-3f73-707c-b729-21448d82d768" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019cb451-7175-70af-af06-ce2ee4a3fc73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_DepreciationAndAmortization_019cb451-7175-70af-af06-ce2ee4a3fc73" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash_019e08f1-3f73-74f9-82f7-03fbb27618a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensationNoncash_019e08f1-3f73-74f9-82f7-03fbb27618a3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfAssets_019e08f1-3f73-7b9e-ad64-d6e8d3c48462" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnSalesOfAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_GainsLossesOnSalesOfAssets_019e08f1-3f73-7b9e-ad64-d6e8d3c48462" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_TransactionCosts_019e08f1-3f73-781c-ba31-6e3ac491b906" xlink:href="wms-20260331.xsd#wms_TransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_TransactionCosts_019e08f1-3f73-781c-ba31-6e3ac491b906" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OtherAdjustedEBITDAAdjustments_019e08f1-3f73-7de1-82b2-159d421c20f8" xlink:href="wms-20260331.xsd#wms_OtherAdjustedEBITDAAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_OtherAdjustedEBITDAAdjustments_019e08f1-3f73-7de1-82b2-159d421c20f8" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e08f1-3f73-7801-b663-7fe594b44745" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e08f1-3f73-7801-b663-7fe594b44745" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e08f1-3f73-714f-8d21-f2ec5fe4086b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e08f1-3f73-714f-8d21-f2ec5fe4086b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e08f1-3f73-794f-b18b-063fb927cb17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e08f1-3f73-794f-b18b-063fb927cb17" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019e08f1-3f73-773e-a317-a88a5c384923" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019e08f1-3f73-773e-a317-a88a5c384923" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SellingGeneralAndAdministrativeAdjusted_019e44f9-bc55-7fc1-885e-e5797caedbf3" xlink:href="wms-20260331.xsd#wms_SellingGeneralAndAdministrativeAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb451-7175-7d89-afed-2dfa8df94da6" xlink:to="loc_wms_SellingGeneralAndAdministrativeAdjusted_019e44f9-bc55-7fc1-885e-e5797caedbf3" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BusinessSegmentInformationReconciliationofGrossProfittoSegmentAdjustedGrossProfitDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BusinessSegmentInformationReconciliationofGrossProfittoSegmentAdjustedGrossProfitDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BusinessSegmentInformationReconciliationofGrossProfittoSegmentAdjustedGrossProfitDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_019cb451-7175-7d0e-b91c-324560d4c9be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_019cb451-7175-7f07-8c91-e519b18f4e9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_019cb451-7175-7d0e-b91c-324560d4c9be" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_019cb451-7175-7f07-8c91-e519b18f4e9b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cb451-7175-736a-8674-084d505a98a4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_019cb451-7175-7f07-8c91-e519b18f4e9b" xlink:to="loc_srt_ConsolidationItemsAxis_019cb451-7175-736a-8674-084d505a98a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb451-7175-736a-8674-084d505a98a4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cb451-7175-736a-8674-084d505a98a4" xlink:to="loc_srt_ConsolidationItemsDomain_019cb451-7175-736a-8674-084d505a98a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb451-7175-74a8-a8b9-01399b5e8d83" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cb451-7175-736a-8674-084d505a98a4" xlink:to="loc_srt_ConsolidationItemsDomain_019cb451-7175-74a8-a8b9-01399b5e8d83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cb451-7175-7d6c-b38f-32a9bf92e65a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb451-7175-74a8-a8b9-01399b5e8d83" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cb451-7175-7d6c-b38f-32a9bf92e65a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-757b-9019-c14b103f0bfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_019cb451-7175-7f07-8c91-e519b18f4e9b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-757b-9019-c14b103f0bfa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-7175-757b-9019-c14b103f0bfa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-757b-9019-c14b103f0bfa" xlink:to="loc_us-gaap_SegmentDomain_019cb451-7175-757b-9019-c14b103f0bfa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb451-7175-71ba-8059-d12de6ca5ea4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb451-7175-757b-9019-c14b103f0bfa" xlink:to="loc_us-gaap_SegmentDomain_019cb451-7175-71ba-8059-d12de6ca5ea4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_StormwaterSegmentMember_019e27e0-d29d-7a21-a4ec-de255ac2544f" xlink:href="wms-20260331.xsd#wms_StormwaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-71ba-8059-d12de6ca5ea4" xlink:to="loc_wms_StormwaterSegmentMember_019e27e0-d29d-7a21-a4ec-de255ac2544f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_WastewaterSegmentMember_019e27e1-5ced-7f3a-839e-1244c57adb3c" xlink:href="wms-20260331.xsd#wms_WastewaterSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-71ba-8059-d12de6ca5ea4" xlink:to="loc_wms_WastewaterSegmentMember_019e27e1-5ced-7f3a-839e-1244c57adb3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_019e27e4-18c5-7cd9-818f-4df4ac8eb983" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb451-7175-71ba-8059-d12de6ca5ea4" xlink:to="loc_us-gaap_AllOtherSegmentsMember_019e27e4-18c5-7cd9-818f-4df4ac8eb983" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019e27df-04e9-7cfc-b3e3-f112bafb158b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_019cb451-7175-7d0e-b91c-324560d4c9be" xlink:to="loc_us-gaap_DepreciationAndAmortization_019e27df-04e9-7cfc-b3e3-f112bafb158b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019e27df-04e9-789a-b086-09f54a9207c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_019cb451-7175-7d0e-b91c-324560d4c9be" xlink:to="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019e27df-04e9-789a-b086-09f54a9207c3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/BusinessSegmentInformationNetSalesandLongLivedAssetbyGeographicLocationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#BusinessSegmentInformationNetSalesandLongLivedAssetbyGeographicLocationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/BusinessSegmentInformationNetSalesandLongLivedAssetbyGeographicLocationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019cb451-7175-7a27-8757-61c6d7cf5daa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019cb451-7175-760d-a50a-344b3956e372" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019cb451-7175-7a27-8757-61c6d7cf5daa" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019cb451-7175-760d-a50a-344b3956e372" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019cb451-7175-7311-8062-afe06fd1722f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019cb451-7175-760d-a50a-344b3956e372" xlink:to="loc_srt_StatementGeographicalAxis_019cb451-7175-7311-8062-afe06fd1722f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019cb451-7175-7311-8062-afe06fd1722f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019cb451-7175-7311-8062-afe06fd1722f" xlink:to="loc_srt_SegmentGeographicalDomain_019cb451-7175-7311-8062-afe06fd1722f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019cb451-7175-71ad-8e01-635628fb0a0f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019cb451-7175-7311-8062-afe06fd1722f" xlink:to="loc_srt_SegmentGeographicalDomain_019cb451-7175-71ad-8e01-635628fb0a0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019cb451-7175-77cc-887c-76b30ba5af23" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019cb451-7175-71ad-8e01-635628fb0a0f" xlink:to="loc_country_US_019cb451-7175-77cc-887c-76b30ba5af23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019cb451-7175-74a1-847f-e772344c663c" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019cb451-7175-71ad-8e01-635628fb0a0f" xlink:to="loc_country_CA_019cb451-7175-74a1-847f-e772344c663c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_OtherCountriesMember_019cb451-7175-7be9-b5a9-d9fbe842147e" xlink:href="wms-20260331.xsd#wms_OtherCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019cb451-7175-71ad-8e01-635628fb0a0f" xlink:to="loc_wms_OtherCountriesMember_019cb451-7175-7be9-b5a9-d9fbe842147e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cb451-7175-76c6-bb18-d763d5f3105d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019cb451-7175-7a27-8757-61c6d7cf5daa" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cb451-7175-76c6-bb18-d763d5f3105d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_019cb451-7175-7e69-98bb-ff93fcf0577d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019cb451-7175-7a27-8757-61c6d7cf5daa" xlink:to="loc_us-gaap_NoncurrentAssets_019cb451-7175-7e69-98bb-ff93fcf0577d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.ads-pipe.com/role/SubsequentEventsAdditionalInformationDetail" xlink:type="simple" xlink:href="wms-20260331.xsd#SubsequentEventsAdditionalInformationDetail"/>
  <link:definitionLink xlink:role="http://www.ads-pipe.com/role/SubsequentEventsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019cb451-7175-7772-a757-ae6394e97383" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019cb451-7175-7f77-b305-ef011ec3a1c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019cb451-7175-7772-a757-ae6394e97383" xlink:to="loc_us-gaap_SubsequentEventTable_019cb451-7175-7f77-b305-ef011ec3a1c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019cb451-7175-7556-88e0-273a7ef4c441" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019cb451-7175-7f77-b305-ef011ec3a1c6" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019cb451-7175-7556-88e0-273a7ef4c441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019cb451-7175-7556-88e0-273a7ef4c441_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019cb451-7175-7556-88e0-273a7ef4c441" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019cb451-7175-7556-88e0-273a7ef4c441_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019cb451-7175-7150-b61a-2a08a8948edd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019cb451-7175-7556-88e0-273a7ef4c441" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019cb451-7175-7150-b61a-2a08a8948edd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019cb451-7175-75f3-bafe-ae899d5e4e99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019cb451-7175-7150-b61a-2a08a8948edd" xlink:to="loc_us-gaap_SubsequentEventMember_019cb451-7175-75f3-bafe-ae899d5e4e99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-7175-7f6c-9715-37476a0edfd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019cb451-7175-7f77-b305-ef011ec3a1c6" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-7175-7f6c-9715-37476a0edfd5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-7175-7f6c-9715-37476a0edfd5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-7175-7f6c-9715-37476a0edfd5" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-7175-7f6c-9715-37476a0edfd5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-7175-70c2-a897-fb6c71e75e76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cb451-7175-7f6c-9715-37476a0edfd5" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-7175-70c2-a897-fb6c71e75e76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_wms_SpartanConcreteIncMember_019cb451-7175-7133-b233-d9440cb4dfbb" xlink:href="wms-20260331.xsd#wms_SpartanConcreteIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cb451-7175-70c2-a897-fb6c71e75e76" xlink:to="loc_wms_SpartanConcreteIncMember_019cb451-7175-7133-b233-d9440cb4dfbb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e08f3-09a7-773b-990d-b10554a882c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019cb451-7175-7f77-b305-ef011ec3a1c6" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e08f3-09a7-773b-990d-b10554a882c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e08f3-09a7-773b-990d-b10554a882c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e08f3-09a7-773b-990d-b10554a882c3" xlink:to="loc_us-gaap_EquityComponentDomain_019e08f3-09a7-773b-990d-b10554a882c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e08f3-09a7-7c6e-80c6-830f9885a8d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e08f3-09a7-773b-990d-b10554a882c3" xlink:to="loc_us-gaap_EquityComponentDomain_019e08f3-09a7-7c6e-80c6-830f9885a8d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019e08f3-09a7-7e39-be61-822b9a7f8300" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e08f3-09a7-7c6e-80c6-830f9885a8d3" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019e08f3-09a7-7e39-be61-822b9a7f8300" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019cb451-7175-78a8-9b76-8ecfd28b291a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019cb451-7175-7772-a757-ae6394e97383" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019cb451-7175-78a8-9b76-8ecfd28b291a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019cb451-7175-7f48-8d0d-bac90e3c77d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019cb451-7175-7772-a757-ae6394e97383" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019cb451-7175-7f48-8d0d-bac90e3c77d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019cb451-7175-73d8-ab24-4701f5e807ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019cb451-7175-7772-a757-ae6394e97383" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019cb451-7175-73d8-ab24-4701f5e807ca" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OtherAssetsNoncurrent" xlink:type="arc" order="101"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="102"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="arc" order="41"/>
  </link:definitionLink>
</link:linkbase>
