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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019ba32d-23bb-7c3a-8234-8784e15db99c,g:9a135f6f-7916-45e3-90d7-a4df8ffb77cb-->
<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://andersen.com/role/Cover" xlink:type="simple" xlink:href="andg-20251231.xsd#Cover"/>
  <link:definitionLink xlink:role="http://andersen.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019cde1d-80d5-70f2-9df3-789f12113c8b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntitiesTable_019cde1d-80d5-70f2-9df3-789f12113c8b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cde1d-80d5-7fcf-95d5-f948f32d2124" 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_dei_EntitiesTable_019cde1d-80d5-70f2-9df3-789f12113c8b" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cde1d-80d5-7fcf-95d5-f948f32d2124" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cde1d-80d5-7fcf-95d5-f948f32d2124_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_019cde1d-80d5-7fcf-95d5-f948f32d2124" xlink:to="loc_us-gaap_ClassOfStockDomain_019cde1d-80d5-7fcf-95d5-f948f32d2124_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cde1d-80d5-75b2-85c2-8a6d15bd267c" 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_019cde1d-80d5-7fcf-95d5-f948f32d2124" xlink:to="loc_us-gaap_ClassOfStockDomain_019cde1d-80d5-75b2-85c2-8a6d15bd267c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019cde1d-80d5-7634-a7a4-677dffe2fab1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cde1d-80d5-75b2-85c2-8a6d15bd267c" xlink:to="loc_us-gaap_CommonClassAMember_019cde1d-80d5-7634-a7a4-677dffe2fab1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019cde1d-80d5-7294-9465-5bf0c5009850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cde1d-80d5-75b2-85c2-8a6d15bd267c" xlink:to="loc_us-gaap_CommonClassBMember_019cde1d-80d5-7294-9465-5bf0c5009850" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019ba331-b809-7ee5-b5a4-e6ef4bb77964" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentType_019ba331-b809-7ee5-b5a4-e6ef4bb77964" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_019be02b-72d4-76da-8e67-baf29c08de88" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentAnnualReport_019be02b-72d4-76da-8e67-baf29c08de88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019ba331-b809-7045-82ca-c1d42c5584bd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentPeriodEndDate_019ba331-b809-7045-82ca-c1d42c5584bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019c4439-4bd1-7510-8ffe-36915cd517d8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_CurrentFiscalYearEndDate_019c4439-4bd1-7510-8ffe-36915cd517d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019ba331-b809-7973-9a8e-02cf85591bd9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentTransitionReport_019ba331-b809-7973-9a8e-02cf85591bd9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019ba331-b809-7845-b766-de03e5823ba1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityFileNumber_019ba331-b809-7845-b766-de03e5823ba1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019ba331-b809-73f6-8f11-8888e93e2c8b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityRegistrantName_019ba331-b809-73f6-8f11-8888e93e2c8b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019ba331-b809-7970-967e-df169095a964" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019ba331-b809-7970-967e-df169095a964" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019ba331-b809-7b2a-93a9-a0f788555c9f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityTaxIdentificationNumber_019ba331-b809-7b2a-93a9-a0f788555c9f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019ba331-b809-74cf-9dcd-76ff04564077" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityAddressAddressLine1_019ba331-b809-74cf-9dcd-76ff04564077" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019ba331-b809-776a-8a0c-715b1b781fe4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityAddressAddressLine2_019ba331-b809-776a-8a0c-715b1b781fe4" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019ba331-b809-7dc8-9880-2348cdc65ee9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityAddressCityOrTown_019ba331-b809-7dc8-9880-2348cdc65ee9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019c9b42-e56e-7afa-9f87-c0a221ba0a2c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityAddressStateOrProvince_019c9b42-e56e-7afa-9f87-c0a221ba0a2c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019ba331-b809-763c-b40e-1290af7b40e4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityAddressPostalZipCode_019ba331-b809-763c-b40e-1290af7b40e4" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019ba331-b809-73f2-b474-5789d957070c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_CityAreaCode_019ba331-b809-73f2-b474-5789d957070c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019ba331-b809-7dc9-87da-43f5c80dda70" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_LocalPhoneNumber_019ba331-b809-7dc9-87da-43f5c80dda70" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019ba331-b809-7537-a834-2440f648dbc1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_Security12bTitle_019ba331-b809-7537-a834-2440f648dbc1" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019ba331-b809-7c0b-a65b-b6bc94b05050" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_TradingSymbol_019ba331-b809-7c0b-a65b-b6bc94b05050" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019ba331-b809-717d-9f8e-d9009f8fcf60" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_SecurityExchangeName_019ba331-b809-717d-9f8e-d9009f8fcf60" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_019be03a-db0c-715d-836e-9bf8ff723b7a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_019be03a-db0c-715d-836e-9bf8ff723b7a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_019be03a-db0c-7ff0-82ab-a127a3f15bac" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityVoluntaryFilers_019be03a-db0c-7ff0-82ab-a127a3f15bac" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019be03a-db0c-7251-8271-544e537357f5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityCurrentReportingStatus_019be03a-db0c-7251-8271-544e537357f5" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019be03a-db0c-7cb2-add2-37f8b5a0e4a4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityInteractiveDataCurrent_019be03a-db0c-7cb2-add2-37f8b5a0e4a4" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019be03b-d61a-79c5-af7d-32536f74c381" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityFilerCategory_019be03b-d61a-79c5-af7d-32536f74c381" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019be03b-d61a-7b63-a687-9f573ac611eb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntitySmallBusiness_019be03b-d61a-7b63-a687-9f573ac611eb" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019be03b-d61a-708b-a391-2bccfe955a1a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityEmergingGrowthCompany_019be03b-d61a-708b-a391-2bccfe955a1a" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019cd176-e334-746c-a85f-06f6d954c814" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityExTransitionPeriod_019cd176-e334-746c-a85f-06f6d954c814" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_019be03a-db0c-7465-aa89-fb2880d4f252" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_IcfrAuditorAttestationFlag_019be03a-db0c-7465-aa89-fb2880d4f252" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_019be03a-db0c-755a-99e4-b346f27e2395" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_019be03a-db0c-755a-99e4-b346f27e2395" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019be03a-db0c-7da1-83c3-4f40d5ee4555" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityShellCompany_019be03a-db0c-7da1-83c3-4f40d5ee4555" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityPublicFloat_019cdd58-bc7d-7c11-9225-26599e1e06de" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPublicFloat"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityPublicFloat_019cdd58-bc7d-7c11-9225-26599e1e06de" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019c443f-3cb7-7905-97a2-a0fcc30fdaf0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019c443f-3cb7-7905-97a2-a0fcc30fdaf0" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentsIncorporatedByReferenceTextBlock_019be03a-f5ad-7d73-84e7-10ab305ddce7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentsIncorporatedByReferenceTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentsIncorporatedByReferenceTextBlock_019be03a-f5ad-7d73-84e7-10ab305ddce7" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019be03d-2b70-7f79-ba8f-72a15992774d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_EntityCentralIndexKey_019be03d-2b70-7f79-ba8f-72a15992774d" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019be03d-2b70-768b-a467-c3d38df93a55" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_AmendmentFlag_019be03d-2b70-768b-a467-c3d38df93a55" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019be03d-2b70-7a4b-8a96-4c257a967c8e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019be03d-2b70-7a4b-8a96-4c257a967c8e" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019be03d-2b70-71d4-ad05-bb88b6d1af99" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cde1d-80d5-7261-bc5a-166dd008b63a" xlink:to="loc_dei_DocumentFiscalYearFocus_019be03d-2b70-71d4-ad05-bb88b6d1af99" xlink:type="arc" order="36"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="andg-20251231.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://andersen.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c707d-1fde-712d-b2f7-1302192ac340" 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_019c707d-1fde-70d0-9e1c-16efab987581" 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_019c707d-1fde-712d-b2f7-1302192ac340" xlink:to="loc_us-gaap_StatementTable_019c707d-1fde-70d0-9e1c-16efab987581" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c707d-1fde-71f0-a100-c4b5d463c078" 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_019c707d-1fde-70d0-9e1c-16efab987581" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c707d-1fde-71f0-a100-c4b5d463c078" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c707d-1fde-71f0-a100-c4b5d463c078_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_019c707d-1fde-71f0-a100-c4b5d463c078" xlink:to="loc_us-gaap_ClassOfStockDomain_019c707d-1fde-71f0-a100-c4b5d463c078_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c707d-1fde-7e03-a4ee-0b75c817383c" 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_019c707d-1fde-71f0-a100-c4b5d463c078" xlink:to="loc_us-gaap_ClassOfStockDomain_019c707d-1fde-7e03-a4ee-0b75c817383c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c7085-0da8-7d83-851e-781198c9c309" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c707d-1fde-7e03-a4ee-0b75c817383c" xlink:to="loc_us-gaap_CommonClassAMember_019c7085-0da8-7d83-851e-781198c9c309" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019c707d-1fde-7bea-aa15-f439145b8f40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c707d-1fde-7e03-a4ee-0b75c817383c" xlink:to="loc_us-gaap_CommonClassBMember_019c707d-1fde-7bea-aa15-f439145b8f40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" 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_StatementLineItems_019c707d-1fde-712d-b2f7-1302192ac340" xlink:to="loc_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019ba331-b809-74ea-a7d4-3f39f93550ba" 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_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019ba331-b809-74ea-a7d4-3f39f93550ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019ba331-b809-70e5-aba8-d46a6da1d56c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019ba331-b809-70e5-aba8-d46a6da1d56c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019ba331-b809-7d3c-8299-d035a2d07564" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesAndLoansReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetCurrent_019ba331-b809-7d3c-8299-d035a2d07564" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAfterAllowanceForCreditLossCurrentRelatedPartyTypeExtensibleEnumeration_019ba331-b809-7e23-9118-7dbdace26987" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAfterAllowanceForCreditLossCurrentRelatedPartyTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_FinancingReceivableAfterAllowanceForCreditLossCurrentRelatedPartyTypeExtensibleEnumeration_019ba331-b809-7e23-9118-7dbdace26987" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLossCurrent_019ba331-b809-76e3-94c9-a21fa2c0743c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLossCurrent_019ba331-b809-76e3-94c9-a21fa2c0743c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019ba331-b809-736f-88a0-59a87ca2283e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019ba331-b809-736f-88a0-59a87ca2283e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019ba331-b809-749d-8df0-7807b4da5036" 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_AssetsCurrentAbstract_019ba331-b809-71a9-b362-fe9d35938fae" xlink:to="loc_us-gaap_AssetsCurrent_019ba331-b809-749d-8df0-7807b4da5036" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019ba331-b809-7823-9fd0-2974f69b4d14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_019ba331-b809-7823-9fd0-2974f69b4d14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019ba331-b809-7c6f-b4ff-3e704c89dc81" 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_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019ba331-b809-7c6f-b4ff-3e704c89dc81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019ba331-b809-71aa-aabe-94197c1f4807" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019ba331-b809-71aa-aabe-94197c1f4807" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ba331-b809-7027-89ac-c5eabf9f2f0f" 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_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ba331-b809-7027-89ac-c5eabf9f2f0f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLossNoncurrent_019ba331-b809-78dd-923a-34e07d47271c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLossNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLossNoncurrent_019ba331-b809-78dd-923a-34e07d47271c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019ba331-b809-7fdd-b4b6-009ec3b6ff8b" 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_AssetsAbstract_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_Goodwill_019ba331-b809-7fdd-b4b6-009ec3b6ff8b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019c704e-b95a-7bc7-ac93-d307c39bbca4" 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_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019c704e-b95a-7bc7-ac93-d307c39bbca4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019ba331-b809-7a88-a989-01b6a82de456" 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_019ba331-b809-7cd4-b8bf-76755682bee6" xlink:to="loc_us-gaap_Assets_019ba331-b809-7a88-a989-01b6a82de456" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c707d-1fde-712d-b2f7-1302192ac340" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_019ba331-b809-79a3-a61d-16caf9257430" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_019ba331-b809-79a3-a61d-16caf9257430" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019ba331-b809-70fa-b0ed-fcd4f1f427fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019ba331-b809-70fa-b0ed-fcd4f1f427fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019ba331-b809-7987-be95-8003e7b4bb15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019ba331-b809-7987-be95-8003e7b4bb15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrent_019c7071-b627-7279-9d64-7ef44817d893" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_DividendsPayableCurrent_019c7071-b627-7279-9d64-7ef44817d893" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019ba331-b809-7008-b24a-17336460dd8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019ba331-b809-7008-b24a-17336460dd8c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableCurrentRelatedPartyTypeExtensibleEnumeration_019d111f-bf1a-7061-a50d-f09d2837c09c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayableCurrentRelatedPartyTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_NotesPayableCurrentRelatedPartyTypeExtensibleEnumeration_019d111f-bf1a-7061-a50d-f09d2837c09c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableCurrent_019c706f-7c3e-7390-9fca-fe908eb23da2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_NotesPayableCurrent_019c706f-7c3e-7390-9fca-fe908eb23da2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019ba331-b809-7218-8aa6-3867c32a5850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019ba331-b809-7218-8aa6-3867c32a5850" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019ba331-b809-76fe-9d7a-7b8e4a1337ca" 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_LiabilitiesCurrentAbstract_019ba331-b809-706f-8693-3d6a80c8f561" xlink:to="loc_us-gaap_LiabilitiesCurrent_019ba331-b809-76fe-9d7a-7b8e4a1337ca" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ba331-b809-7773-b18f-a44e21a76b29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ba331-b809-7773-b18f-a44e21a76b29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableNoncurrentRelatedPartyTypeExtensibleEnumeration_019d1122-3ef1-7f79-abf3-61966dc9f80d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayableNoncurrentRelatedPartyTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_NotesPayableNoncurrentRelatedPartyTypeExtensibleEnumeration_019d1122-3ef1-7f79-abf3-61966dc9f80d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermNotesPayable_019c7072-eff7-784e-9c9e-e4095593ec6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_LongTermNotesPayable_019c7072-eff7-784e-9c9e-e4095593ec6b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019ba331-b809-7e5d-aa1e-b7c6640b50b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019ba331-b809-7e5d-aa1e-b7c6640b50b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019ba331-b809-7c2d-bffc-95daac666686" 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_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_Liabilities_019ba331-b809-7c2d-bffc-95daac666686" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019ba331-b809-723c-b2b9-4df107863432" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019ba331-b809-723c-b2b9-4df107863432" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019cd236-65bf-75e5-855d-cc9620bf6d76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019cd236-65bf-75e5-855d-cc9620bf6d76" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity_019ba331-b809-7e68-b8fd-8a53ab3b602a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MembersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:to="loc_us-gaap_MembersEquity_019ba331-b809-7e68-b8fd-8a53ab3b602a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019c7077-78f9-78a8-bb99-fa591093e08a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:to="loc_us-gaap_PreferredStockValue_019c7077-78f9-78a8-bb99-fa591093e08a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019c7077-a37e-7542-916d-9ab1cc864f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:to="loc_us-gaap_CommonStockValue_019c7077-a37e-7542-916d-9ab1cc864f3c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019c7074-7762-7187-8d8b-e82ed21daddc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019c7074-7762-7187-8d8b-e82ed21daddc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019c7074-95ec-76ff-8107-dedf19962c2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019c7074-95ec-76ff-8107-dedf19962c2b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c7074-b760-7cc7-bd28-af61e695cd3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019ba331-b809-7586-a48b-6c495b4b37dd" xlink:to="loc_us-gaap_StockholdersEquity_019c7074-b760-7cc7-bd28-af61e695cd3b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ba331-b809-7f09-b0f4-cd5c9f756a24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019ba331-b809-7fc1-af78-995d8ec23544" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ba331-b809-7f09-b0f4-cd5c9f756a24" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="andg-20251231.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:definitionLink xlink:role="http://andersen.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" 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_019d0632-f62c-7e6b-8c6a-75b15f5fac29" 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_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_StatementTable_019d0632-f62c-7e6b-8c6a-75b15f5fac29" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019d0632-f62c-7750-b2c5-3621a771429c" 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_019d0632-f62c-7e6b-8c6a-75b15f5fac29" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019d0632-f62c-7750-b2c5-3621a771429c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019d0632-f62c-7750-b2c5-3621a771429c_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_019d0632-f62c-7750-b2c5-3621a771429c" xlink:to="loc_us-gaap_ClassOfStockDomain_019d0632-f62c-7750-b2c5-3621a771429c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019d0632-f62c-7c2b-92ac-fc113bbed411" 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_019d0632-f62c-7750-b2c5-3621a771429c" xlink:to="loc_us-gaap_ClassOfStockDomain_019d0632-f62c-7c2b-92ac-fc113bbed411" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019d0633-a0e8-7066-9ef6-1fe60f35aca3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019d0632-f62c-7c2b-92ac-fc113bbed411" xlink:to="loc_us-gaap_CommonClassAMember_019d0633-a0e8-7066-9ef6-1fe60f35aca3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-7f72-a3e9-05f1aad9ec2a" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-7f72-a3e9-05f1aad9ec2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingCostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_019ba331-b809-7010-b05f-d7ccc05f52ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:to="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_019ba331-b809-7010-b05f-d7ccc05f52ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019ba331-b809-7f79-b284-4d884258656f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019ba331-b809-7f79-b284-4d884258656f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019c70a5-f6eb-77b1-9d76-ef793389472f" xlink:href="andg-20251231.xsd#andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:to="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019c70a5-f6eb-77b1-9d76-ef793389472f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization_019ba331-b809-7a52-a8fd-0b18e13a7cf0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization_019ba331-b809-7a52-a8fd-0b18e13a7cf0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019ba331-b809-714e-be6b-668041b569d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019ba331-b809-7038-a075-c2b96c51511c" xlink:to="loc_us-gaap_CostsAndExpenses_019ba331-b809-714e-be6b-668041b569d4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019ba331-b809-7040-a360-9913c702fd3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_OperatingIncomeLoss_019ba331-b809-7040-a360-9913c702fd3a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019ba331-b809-74c0-86b9-188ab0f34f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019ba331-b809-74c0-86b9-188ab0f34f8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019ba331-b809-7e3d-82b6-e659908f91b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019ba331-b809-7e3d-82b6-e659908f91b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019ba331-b809-7029-a128-89ecd79fae93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019ba331-b809-7029-a128-89ecd79fae93" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ba331-b809-7f0b-baed-624e4cc55633" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ba331-b809-7f0b-baed-624e4cc55633" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ba331-b809-7f05-8a8f-3e2cbaedb2c4" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019ba331-b809-7f05-8a8f-3e2cbaedb2c4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019c7097-7dd5-787f-9c5a-23f6dc97b643" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_ProfitLoss_019c7097-7dd5-787f-9c5a-23f6dc97b643" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019cd23a-f5e6-715e-96fe-84318e0dafec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019cd23a-f5e6-715e-96fe-84318e0dafec" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ba331-b809-748b-b0d3-f5d01a2218d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_NetIncomeLoss_019ba331-b809-748b-b0d3-f5d01a2218d5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019c7098-0951-7018-9137-a1942cc78164" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_EarningsPerShareBasic_019c7098-0951-7018-9137-a1942cc78164" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019c7098-0951-734f-b037-593b4c0c2999" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019c7098-0951-734f-b037-593b4c0c2999" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019c7098-0951-7c55-bbda-4dcac6b11ccf" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019c7098-0951-7c55-bbda-4dcac6b11ccf" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019c7098-0951-79e3-b146-3bb53884a076" 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_StatementLineItems_019d0632-f62c-7e9a-986c-695a0d2df37f" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019c7098-0951-79e3-b146-3bb53884a076" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSDEFICITMEMBERSEQUITY" xlink:type="simple" xlink:href="andg-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSDEFICITMEMBERSEQUITY"/>
  <link:definitionLink xlink:role="http://andersen.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSDEFICITMEMBERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cd69f-bc11-7d8d-8cc2-c57b8d9616a8" 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_019cd69f-bc11-7988-a78a-b54884413a71" 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_019cd69f-bc11-7d8d-8cc2-c57b8d9616a8" xlink:to="loc_us-gaap_StatementTable_019cd69f-bc11-7988-a78a-b54884413a71" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cd69f-bc11-743e-81c8-014ecffba246" 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_019cd69f-bc11-7988-a78a-b54884413a71" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cd69f-bc11-743e-81c8-014ecffba246" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cd69f-bc11-743e-81c8-014ecffba246_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_019cd69f-bc11-743e-81c8-014ecffba246" xlink:to="loc_us-gaap_EquityComponentDomain_019cd69f-bc11-743e-81c8-014ecffba246_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cd69f-bc11-7008-b230-b2ddc4a46bcd" 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_019cd69f-bc11-743e-81c8-014ecffba246" xlink:to="loc_us-gaap_EquityComponentDomain_019cd69f-bc11-7008-b230-b2ddc4a46bcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MemberUnitsMember_019cd69f-bc11-7193-b58c-2c8da675ce4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MemberUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cd69f-bc11-7008-b230-b2ddc4a46bcd" xlink:to="loc_us-gaap_MemberUnitsMember_019cd69f-bc11-7193-b58c-2c8da675ce4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019cd69f-bc11-7568-ba09-10314960f34c" 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_EquityComponentDomain_019cd69f-bc11-7008-b230-b2ddc4a46bcd" xlink:to="loc_us-gaap_RetainedEarningsMember_019cd69f-bc11-7568-ba09-10314960f34c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cd69f-bc11-786b-b7d0-68f14e03e2c6" 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_EquityComponentDomain_019cd69f-bc11-7008-b230-b2ddc4a46bcd" xlink:to="loc_us-gaap_CommonStockMember_019cd69f-bc11-786b-b7d0-68f14e03e2c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019cd69f-bc11-7681-9fae-b4dffebe565f" 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_EquityComponentDomain_019cd69f-bc11-7008-b230-b2ddc4a46bcd" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019cd69f-bc11-7681-9fae-b4dffebe565f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019cd69f-bc11-7fab-9a9f-f1954b142c75" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cd69f-bc11-7988-a78a-b54884413a71" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019cd69f-bc11-7fab-9a9f-f1954b142c75" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019cd69f-bc11-7fab-9a9f-f1954b142c75_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019cd69f-bc11-7fab-9a9f-f1954b142c75" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019cd69f-bc11-7fab-9a9f-f1954b142c75_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019cd69f-bc11-749c-8837-9b825b17cae4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019cd69f-bc11-7fab-9a9f-f1954b142c75" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019cd69f-bc11-749c-8837-9b825b17cae4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_019cd69f-bc11-7bb1-a12f-af0f51205885" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019cd69f-bc11-749c-8837-9b825b17cae4" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_019cd69f-bc11-7bb1-a12f-af0f51205885" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cd69f-bc11-7c5b-8c90-5961335c0bb8" 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_019cd69f-bc11-7988-a78a-b54884413a71" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cd69f-bc11-7c5b-8c90-5961335c0bb8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cd69f-bc11-7c5b-8c90-5961335c0bb8_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_019cd69f-bc11-7c5b-8c90-5961335c0bb8" xlink:to="loc_us-gaap_ClassOfStockDomain_019cd69f-bc11-7c5b-8c90-5961335c0bb8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cd69f-bc11-73de-b92b-2b86f6d250e7" 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_019cd69f-bc11-7c5b-8c90-5961335c0bb8" xlink:to="loc_us-gaap_ClassOfStockDomain_019cd69f-bc11-73de-b92b-2b86f6d250e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019cd6a3-2f07-7d83-8661-6a7f64c07f00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cd69f-bc11-73de-b92b-2b86f6d250e7" xlink:to="loc_us-gaap_CommonClassAMember_019cd6a3-2f07-7d83-8661-6a7f64c07f00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019cd69f-bc11-7bbd-9670-f853eeb7406e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cd69f-bc11-73de-b92b-2b86f6d250e7" xlink:to="loc_us-gaap_CommonClassBMember_019cd69f-bc11-7bbd-9670-f853eeb7406e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:href="andg-20251231.xsd#andg_IncreaseDecreaseInMembersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cd69f-bc11-7d8d-8cc2-c57b8d9616a8" xlink:to="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity_019cd69f-bc11-735a-8611-c61262f1b552" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MembersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_us-gaap_MembersEquity_019cd69f-bc11-735a-8611-c61262f1b552" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019d1d8c-d34c-7af1-8005-81f5bf150077" 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_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_us-gaap_ProfitLoss_019d1d8c-d34c-7af1-8005-81f5bf150077" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_NetIncomeLossBeforeEquityRestructuring_019d1d94-1626-740f-851b-7c804fc3dfd9" xlink:href="andg-20251231.xsd#andg_NetIncomeLossBeforeEquityRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_andg_NetIncomeLossBeforeEquityRestructuring_019d1d94-1626-740f-851b-7c804fc3dfd9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_019cd69f-bc11-7778-b4ff-230e7f2bf92f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Dividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_us-gaap_Dividends_019cd69f-bc11-7778-b4ff-230e7f2bf92f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation_019cd69f-bc11-7263-bfa1-4e5a52163ebe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation_019cd69f-bc11-7263-bfa1-4e5a52163ebe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_NotesIssuedDuringPeriodValueRelatedParty_019cd69f-bc11-7ffa-b8ef-74386bb1b07a" xlink:href="andg-20251231.xsd#andg_NotesIssuedDuringPeriodValueRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_andg_NotesIssuedDuringPeriodValueRelatedParty_019cd69f-bc11-7ffa-b8ef-74386bb1b07a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019cd69f-bc11-71ee-8559-51ed974e02bf" xlink:href="andg-20251231.xsd#andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019cd69f-bc11-71ee-8559-51ed974e02bf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ReclassificationOfMembersEquityToNoncontrollingInterestsAmount_019cd69f-bc11-7aba-a2a1-95fead252752" xlink:href="andg-20251231.xsd#andg_ReclassificationOfMembersEquityToNoncontrollingInterestsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_IncreaseDecreaseInMembersEquityRollForward_019d0625-22a9-7812-ae98-ce5c72335125" xlink:to="loc_andg_ReclassificationOfMembersEquityToNoncontrollingInterestsAmount_019cd69f-bc11-7aba-a2a1-95fead252752" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MembersEquity_019cd6a4-742d-7ed6-aeb4-95fcbab1a1a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MembersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" 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_019cd69f-bc11-7d8d-8cc2-c57b8d9616a8" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019cd6a4-c0b5-7da7-b1c3-fd9fa874cf4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_SharesOutstanding_019cd6a4-c0b5-7da7-b1c3-fd9fa874cf4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019d0ca2-cc09-7545-86c6-28d3f92a6e96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_StockholdersEquity_019d0ca2-cc09-7545-86c6-28d3f92a6e96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019cd69f-bc11-7c4d-86f6-d2aa953c20ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019cd69f-bc11-7c4d-86f6-d2aa953c20ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019cd69f-bc11-76de-8319-aca65962af99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019cd69f-bc11-76de-8319-aca65962af99" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AdjustmentsToAdditionalPaidInCapitalDeferredTaxAsset_019ce6ba-fa08-7fc0-83d1-19beef1517a6" xlink:href="andg-20251231.xsd#andg_AdjustmentsToAdditionalPaidInCapitalDeferredTaxAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_andg_AdjustmentsToAdditionalPaidInCapitalDeferredTaxAsset_019ce6ba-fa08-7fc0-83d1-19beef1517a6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AdjustmentsToAdditionalPaidInCapitalReallocationOfEquity_019cd69f-bc11-75fe-b89c-5f5f9a974539" xlink:href="andg-20251231.xsd#andg_AdjustmentsToAdditionalPaidInCapitalReallocationOfEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_andg_AdjustmentsToAdditionalPaidInCapitalReallocationOfEquity_019cd69f-bc11-75fe-b89c-5f5f9a974539" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_019cd69f-bc11-7357-94fa-677353277c73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_019cd69f-bc11-7357-94fa-677353277c73" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_019cd69f-bc11-76fe-afff-d369668ca542" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_019cd69f-bc11-76fe-afff-d369668ca542" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019d0618-43e2-7756-b480-cbd7aaf8ff62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_NetIncomeLoss_019d0618-43e2-7756-b480-cbd7aaf8ff62" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019cd69f-bc11-7e85-b1da-c4b3594da114" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019cd69f-bc11-7e85-b1da-c4b3594da114" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019d0ca1-3dce-727a-95f2-5adac69b6fd2" 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_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019d0ca1-3dce-727a-95f2-5adac69b6fd2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedemptionPremium_019cd69f-bc11-78d6-8e88-e908ea8cb884" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedemptionPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019d0624-746b-7aa1-9ecc-66e01d64f125" xlink:to="loc_us-gaap_RedemptionPremium_019cd69f-bc11-78d6-8e88-e908ea8cb884" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019cd69f-bc11-725d-89cb-1f26836753ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019d0615-41ed-78ed-a0ef-ecb4e2339687" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="andg-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:definitionLink xlink:role="http://andersen.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cd242-4be5-74a1-82e8-01c79d3f8662" 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_019cd242-4be5-7843-aeab-51186c4e1821" 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_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_StatementTable_019cd242-4be5-7843-aeab-51186c4e1821" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cd243-567b-71df-abd0-107916c070e9" 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_StatementTable_019cd242-4be5-7843-aeab-51186c4e1821" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cd243-567b-71df-abd0-107916c070e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cd243-567b-71df-abd0-107916c070e9_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_019cd243-567b-71df-abd0-107916c070e9" xlink:to="loc_us-gaap_RelatedPartyDomain_019cd243-567b-71df-abd0-107916c070e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cd243-567b-781f-a3d0-7f1cb581bd02" 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_019cd243-567b-71df-abd0-107916c070e9" xlink:to="loc_us-gaap_RelatedPartyDomain_019cd243-567b-781f-a3d0-7f1cb581bd02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019cd243-567b-72ba-854b-4954e8646f55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cd243-567b-781f-a3d0-7f1cb581bd02" xlink:to="loc_us-gaap_RelatedPartyMember_019cd243-567b-72ba-854b-4954e8646f55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-7967-8c74-4ac9a817f30a" 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_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-7967-8c74-4ac9a817f30a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019ba331-b809-7009-97e5-ebe2713c8f63" 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_019ba331-b809-7967-8c74-4ac9a817f30a" xlink:to="loc_us-gaap_ProfitLoss_019ba331-b809-7009-97e5-ebe2713c8f63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" 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_019ba331-b809-7967-8c74-4ac9a817f30a" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlement_019c70af-4952-7cef-8b84-fa6b95733f99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossRelatedToLitigationSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_GainLossRelatedToLitigationSettlement_019c70af-4952-7cef-8b84-fa6b95733f99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019c70ae-83a2-7bce-ad26-b241d483b63d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_ShareBasedCompensation_019c70ae-83a2-7bce-ad26-b241d483b63d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019ba331-b809-7199-a745-fa358cffd1e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019ba331-b809-7199-a745-fa358cffd1e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_NonCashOperatingLeaseExpense_019ba331-b809-7f88-a95a-62a17f596ade" xlink:href="andg-20251231.xsd#andg_NonCashOperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_andg_NonCashOperatingLeaseExpense_019ba331-b809-7f88-a95a-62a17f596ade" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_019ba331-b809-78b2-9296-b00d0040173a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_019ba331-b809-78b2-9296-b00d0040173a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019ba331-b809-7854-868e-248e8788c055" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019ba331-b809-7854-868e-248e8788c055" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_019ba331-b809-70e3-b93a-e0881d13f681" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_019ba331-b809-70e3-b93a-e0881d13f681" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_019ba331-b809-7167-a29f-ac88dab92639" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_019ba331-b809-7167-a29f-ac88dab92639" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019c70af-fa31-7798-b0a0-5acd9125d54c" xlink:href="andg-20251231.xsd#andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019c70af-fa31-7798-b0a0-5acd9125d54c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019ba331-b809-7273-9130-ede248f1aa16" 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_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019ba331-b809-7273-9130-ede248f1aa16" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" 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_019ba331-b809-77dc-a0c6-3fb6256cef92" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019ba331-b809-7740-a5c3-2d7a28624650" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019ba331-b809-7740-a5c3-2d7a28624650" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019ba331-b809-7bdb-9edd-c1c503ceaec9" 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_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019ba331-b809-7bdb-9edd-c1c503ceaec9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019c70b1-43ff-7a27-a241-9b882c4fd69b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019c70b1-43ff-7a27-a241-9b882c4fd69b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019ba331-b809-7e41-a6a5-10b24af5e0da" 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_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019ba331-b809-7e41-a6a5-10b24af5e0da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_019ba331-b809-7804-8fdc-7888a420141d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_019ba331-b809-7804-8fdc-7888a420141d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019ba331-b809-7990-ba23-d1af7b0c84ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019ba331-b809-7990-ba23-d1af7b0c84ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_019ba331-b809-7219-ad3b-4cfe17087ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_019ba331-b809-7219-ad3b-4cfe17087ec2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019ba331-b809-78dc-afa9-79ae315325ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019ba331-b809-78dc-afa9-79ae315325ee" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019ba331-b809-7a39-9612-81375474abd4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019ba331-b809-7ff9-a6ed-ed36a709e453" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019ba331-b809-7a39-9612-81375474abd4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ba331-b809-764a-845e-ccd09d065501" 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_019ba331-b809-7967-8c74-4ac9a817f30a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ba331-b809-764a-845e-ccd09d065501" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" 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_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_019ba331-b809-76d1-ae5a-4b11485abb4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_019ba331-b809-76d1-ae5a-4b11485abb4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_019ba331-b809-77fa-81bc-c89c7dbe04e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_019ba331-b809-77fa-81bc-c89c7dbe04e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OriginationOfNotesReceivableFromRelatedParties_019ba331-b809-72f0-9c98-4048d45c1d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OriginationOfNotesReceivableFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_OriginationOfNotesReceivableFromRelatedParties_019ba331-b809-72f0-9c98-4048d45c1d9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentOfNotesReceivableFromRelatedParties_019ba331-b809-768b-8cd7-d2f5560728f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentOfNotesReceivableFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_RepaymentOfNotesReceivableFromRelatedParties_019ba331-b809-768b-8cd7-d2f5560728f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019ba331-b809-7a62-813d-c638877227b2" 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_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019ba331-b809-7a62-813d-c638877227b2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireSoftware_019ba331-b809-7f4e-844f-16053b9d4bf0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireSoftware"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_PaymentsToAcquireSoftware_019ba331-b809-7f4e-844f-16053b9d4bf0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ba331-b809-773c-816e-cf8568a2c23a" 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_019ba331-b809-7ec6-b350-abcb2b849306" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ba331-b809-773c-816e-cf8568a2c23a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" 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_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019c70b5-22da-7c79-9e48-f9cf29f2f4d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019c70b5-22da-7c79-9e48-f9cf29f2f4d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019ba331-b809-798c-988a-852d1ffad5df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019ba331-b809-798c-988a-852d1ffad5df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019c70b4-7170-74cc-847f-0b0fa6e8df48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019c70b4-7170-74cc-847f-0b0fa6e8df48" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_019ba331-b809-7a21-8dce-b6ac581ee03a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_019ba331-b809-7a21-8dce-b6ac581ee03a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_019ba331-b809-7b03-9bc7-a30882d9ce85" 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_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_019ba331-b809-7b03-9bc7-a30882d9ce85" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDistributionsToAffiliates_019ba331-b809-79b5-b4ac-ecefc5190c69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDistributionsToAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_PaymentsOfDistributionsToAffiliates_019ba331-b809-79b5-b4ac-ecefc5190c69" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ba331-b809-7dfb-835f-822ac1661e1a" 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_019ba331-b809-7d77-95c0-fc990ad9da80" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ba331-b809-7dfb-835f-822ac1661e1a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019ba331-b809-74e8-a56f-81d33c7ac8db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019ba331-b809-74e8-a56f-81d33c7ac8db" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ba331-b809-7e23-966a-4263e9083820" 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_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ba331-b809-7e23-966a-4263e9083820" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ba331-b809-761d-b2ca-024984247e4f" 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_SupplementalCashFlowInformationAbstract_019be62e-2f95-7ace-bb96-40a04fe67c03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_019be62e-2f95-7ace-bb96-40a04fe67c03" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_019be632-512b-705b-9eb9-e9cbe9db1343" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019be62e-2f95-7ace-bb96-40a04fe67c03" xlink:to="loc_us-gaap_InterestPaidNet_019be632-512b-705b-9eb9-e9cbe9db1343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019be62e-9af0-7e07-b0f9-b0bfda7e2344" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019be62e-2f95-7ace-bb96-40a04fe67c03" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019be62e-9af0-7e07-b0f9-b0bfda7e2344" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cd242-4be5-74a1-82e8-01c79d3f8662" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_019ba331-b809-7ab8-be3a-8c2e385f0fc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_019ba331-b809-7ab8-be3a-8c2e385f0fc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019ba331-b809-71c7-b962-0e4531618e84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019ba331-b809-71c7-b962-0e4531618e84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_RightOfUseAssetAndLeaseLiabilityAdjustmentsDueToRemeasurement_019c70b8-ec3c-704d-b71a-5955c8610ba3" xlink:href="andg-20251231.xsd#andg_RightOfUseAssetAndLeaseLiabilityAdjustmentsDueToRemeasurement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_andg_RightOfUseAssetAndLeaseLiabilityAdjustmentsDueToRemeasurement_019c70b8-ec3c-704d-b71a-5955c8610ba3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c70ca-74ff-732e-b7d2-370c43cbac2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019c70ca-74ff-732e-b7d2-370c43cbac2c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_UnpaidDeferredOfferingCosts_019c70df-fb88-734f-9f56-8c4452262d42" xlink:href="andg-20251231.xsd#andg_UnpaidDeferredOfferingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_andg_UnpaidDeferredOfferingCosts_019c70df-fb88-734f-9f56-8c4452262d42" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ReclassificationOfDeferredOfferingCostsPaidInPriorYearToAdditionalPaidInCapitalUponIPO_019cdaca-4f23-7b21-8979-d19b2a3e846d" xlink:href="andg-20251231.xsd#andg_ReclassificationOfDeferredOfferingCostsPaidInPriorYearToAdditionalPaidInCapitalUponIPO"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_andg_ReclassificationOfDeferredOfferingCostsPaidInPriorYearToAdditionalPaidInCapitalUponIPO_019cdaca-4f23-7b21-8979-d19b2a3e846d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_019c70d8-7e6f-7410-97dc-78aba9a94d8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_019c70d8-7e6f-7410-97dc-78aba9a94d8c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesIssued1_019d063b-5ed5-7cc1-a018-98283ba77d7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_us-gaap_NotesIssued1_019d063b-5ed5-7cc1-a018-98283ba77d7a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_SettlementOfDeferredCompensationLiabilityWithLongTermIncentivePlanUnitIssuance_019c70de-7a00-769c-ba67-d6191cf44316" xlink:href="andg-20251231.xsd#andg_SettlementOfDeferredCompensationLiabilityWithLongTermIncentivePlanUnitIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019ba331-b809-7352-84a3-9ca7796510ba" xlink:to="loc_andg_SettlementOfDeferredCompensationLiabilityWithLongTermIncentivePlanUnitIssuance_019c70de-7a00-769c-ba67-d6191cf44316" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="andg-20251231.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://andersen.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" 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_019c7080-a55a-73f5-b17d-34d33dc96d9e" 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_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_StatementTable_019c7080-a55a-73f5-b17d-34d33dc96d9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c7080-a55a-75c1-bd39-10f7c4a89f38" 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_019c7080-a55a-73f5-b17d-34d33dc96d9e" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c7080-a55a-75c1-bd39-10f7c4a89f38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c7080-a55a-75c1-bd39-10f7c4a89f38_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_019c7080-a55a-75c1-bd39-10f7c4a89f38" xlink:to="loc_us-gaap_ClassOfStockDomain_019c7080-a55a-75c1-bd39-10f7c4a89f38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c7080-a55a-78cf-95ea-da570ee8e328" 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_019c7080-a55a-75c1-bd39-10f7c4a89f38" xlink:to="loc_us-gaap_ClassOfStockDomain_019c7080-a55a-78cf-95ea-da570ee8e328" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c7080-a55a-7687-a993-5e6c92cc6bbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7080-a55a-78cf-95ea-da570ee8e328" xlink:to="loc_us-gaap_CommonClassAMember_019c7080-a55a-7687-a993-5e6c92cc6bbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019c7080-a55a-7f70-a572-3e9218219196" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7080-a55a-78cf-95ea-da570ee8e328" xlink:to="loc_us-gaap_CommonClassBMember_019c7080-a55a-7f70-a572-3e9218219196" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019ba331-b809-7733-85bf-ff65eb9f362d" 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_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019ba331-b809-7733-85bf-ff65eb9f362d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019ba331-b809-7c1a-b73e-edbc4bcc4512" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForNotesAndLoansReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019ba331-b809-7c1a-b73e-edbc4bcc4512" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_019ba331-b809-7867-bf76-bfe74cfe7099" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_019ba331-b809-7867-bf76-bfe74cfe7099" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c7080-a55a-7ce4-ac4d-af91eafdeff5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c7080-a55a-7ce4-ac4d-af91eafdeff5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_019c7080-a55a-7c44-ab4b-c667146534ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_PreferredStockSharesIssued_019c7080-a55a-7c44-ab4b-c667146534ee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019c7080-a55a-7bbf-8e1a-936bb7e1d421" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_019c7080-a55a-7bbf-8e1a-936bb7e1d421" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019c7080-a55a-7e33-a7b3-689dabdb8ed5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019c7080-a55a-7e33-a7b3-689dabdb8ed5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019c7080-a55a-7fb6-9045-5e0596245dd3" 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_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019c7080-a55a-7fb6-9045-5e0596245dd3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c7080-a55a-7d0b-a416-1ea0b1bad705" 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_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c7080-a55a-7d0b-a416-1ea0b1bad705" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019c7080-a55a-7e18-a036-1a8a2f9a5b3a" 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_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_CommonStockSharesIssued_019c7080-a55a-7e18-a036-1a8a2f9a5b3a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c7080-a55a-7a04-8547-ac0ee0f6cb63" 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_019c7080-a55a-7a50-a2ad-d9d5d7412529" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c7080-a55a-7a04-8547-ac0ee0f6cb63" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/OrganizationandBusinessDescriptionDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#OrganizationandBusinessDescriptionDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/OrganizationandBusinessDescriptionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019ba331-b809-70b9-9e0e-743902146081" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019ba331-b809-70b9-9e0e-743902146081" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-70b9-9e0e-743902146081_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_019ba331-b809-70b9-9e0e-743902146081" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-70b9-9e0e-743902146081_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-75da-ae86-0f4fd12084d9" 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_019ba331-b809-70b9-9e0e-743902146081" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-75da-ae86-0f4fd12084d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCMember_019ca0a5-623a-7d2f-a7b6-c7d34037859e" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-75da-ae86-0f4fd12084d9" xlink:to="loc_andg_ATUmbrellaLLCMember_019ca0a5-623a-7d2f-a7b6-c7d34037859e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenTaxHoldingsLLCMember_019ba331-b809-7422-8c0f-e6b63839ba76" xlink:href="andg-20251231.xsd#andg_AndersenTaxHoldingsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-75da-ae86-0f4fd12084d9" xlink:to="loc_andg_AndersenTaxHoldingsLLCMember_019ba331-b809-7422-8c0f-e6b63839ba76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenAggregatorLLCMember_019cbe67-1290-7245-9d4e-fdb195f6ebad" xlink:href="andg-20251231.xsd#andg_AndersenAggregatorLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019ba331-b809-75da-ae86-0f4fd12084d9" xlink:to="loc_andg_AndersenAggregatorLLCMember_019cbe67-1290-7245-9d4e-fdb195f6ebad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c7081-23df-7477-bce1-203780b96c1b" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c7081-23df-7477-bce1-203780b96c1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c7081-23df-7477-bce1-203780b96c1b_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_019c7081-23df-7477-bce1-203780b96c1b" xlink:to="loc_us-gaap_ClassOfStockDomain_019c7081-23df-7477-bce1-203780b96c1b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c7081-23df-7959-9920-0716de6dfd29" 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_019c7081-23df-7477-bce1-203780b96c1b" xlink:to="loc_us-gaap_ClassOfStockDomain_019c7081-23df-7959-9920-0716de6dfd29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c7081-5ded-788e-b9ad-2342d3bc0cc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7081-23df-7959-9920-0716de6dfd29" xlink:to="loc_us-gaap_CommonClassAMember_019c7081-5ded-788e-b9ad-2342d3bc0cc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019c70af-dec9-7545-aa03-a129ea89e3e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7081-23df-7959-9920-0716de6dfd29" xlink:to="loc_us-gaap_CommonClassBMember_019c70af-dec9-7545-aa03-a129ea89e3e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019ba331-b809-7379-94d7-b41beac61eac" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_dei_LegalEntityAxis_019ba331-b809-7379-94d7-b41beac61eac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019ba331-b809-7379-94d7-b41beac61eac_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_019ba331-b809-7379-94d7-b41beac61eac" xlink:to="loc_dei_EntityDomain_019ba331-b809-7379-94d7-b41beac61eac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019ba331-b809-7a79-a927-9a0f5b33738b" 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_019ba331-b809-7379-94d7-b41beac61eac" xlink:to="loc_dei_EntityDomain_019ba331-b809-7a79-a927-9a0f5b33738b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ManagementHoldcoMember_019c70fc-3ae6-78f9-a03c-cbcd6cefdc34" xlink:href="andg-20251231.xsd#andg_ManagementHoldcoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019ba331-b809-7a79-a927-9a0f5b33738b" xlink:to="loc_andg_ManagementHoldcoMember_019c70fc-3ae6-78f9-a03c-cbcd6cefdc34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCMember_019c70ba-1470-7a3b-9092-6045fe2c9156" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019ba331-b809-7a79-a927-9a0f5b33738b" xlink:to="loc_andg_ATUmbrellaLLCMember_019c70ba-1470-7a3b-9092-6045fe2c9156" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019ba331-b809-7aed-81e4-f719de53843e" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_srt_OwnershipAxis_019ba331-b809-7aed-81e4-f719de53843e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019ba331-b809-7aed-81e4-f719de53843e_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_019ba331-b809-7aed-81e4-f719de53843e" xlink:to="loc_srt_OwnershipDomain_019ba331-b809-7aed-81e4-f719de53843e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019ba331-b809-7e67-9c6e-e42dccecbbff" 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_019ba331-b809-7aed-81e4-f719de53843e" xlink:to="loc_srt_OwnershipDomain_019ba331-b809-7e67-9c6e-e42dccecbbff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenGroupIncMember_019ba331-b809-798c-b3b6-5f5c6f8a64e1" xlink:href="andg-20251231.xsd#andg_AndersenGroupIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019ba331-b809-7e67-9c6e-e42dccecbbff" xlink:to="loc_andg_AndersenGroupIncMember_019ba331-b809-798c-b3b6-5f5c6f8a64e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenAggregatorLLCMember_019ca0d5-283a-7199-b554-edd3b6c26417" xlink:href="andg-20251231.xsd#andg_AndersenAggregatorLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019ba331-b809-7e67-9c6e-e42dccecbbff" xlink:to="loc_andg_AndersenAggregatorLLCMember_019ca0d5-283a-7199-b554-edd3b6c26417" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c70b5-2331-7f2c-a07f-fe2f20e0f091" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c70b5-2331-7f2c-a07f-fe2f20e0f091" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7f2c-a07f-fe2f20e0f091_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_019c70b5-2331-7f2c-a07f-fe2f20e0f091" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7f2c-a07f-fe2f20e0f091_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7b3d-acbd-ad9f38e2a364" 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_019c70b5-2331-7f2c-a07f-fe2f20e0f091" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7b3d-acbd-ad9f38e2a364" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_MemberNotesMember_019cbe77-379b-7876-80c9-46bf12bb317f" xlink:href="andg-20251231.xsd#andg_MemberNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7b3d-acbd-ad9f38e2a364" xlink:to="loc_andg_MemberNotesMember_019cbe77-379b-7876-80c9-46bf12bb317f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_CapitalAccountNotesMember_019c70b5-5c73-7604-bfd3-520efa1fd7aa" xlink:href="andg-20251231.xsd#andg_CapitalAccountNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7b3d-acbd-ad9f38e2a364" xlink:to="loc_andg_CapitalAccountNotesMember_019c70b5-5c73-7604-bfd3-520efa1fd7aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_HoldoverNoteMember_019cbe84-3153-7b00-ad7b-a3d47189202e" xlink:href="andg-20251231.xsd#andg_HoldoverNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7b3d-acbd-ad9f38e2a364" xlink:to="loc_andg_HoldoverNoteMember_019cbe84-3153-7b00-ad7b-a3d47189202e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_TRAPartiesMember_019cd17c-590b-7ddf-8b19-0c0176a6e697" xlink:href="andg-20251231.xsd#andg_TRAPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c70b5-2331-7b3d-acbd-ad9f38e2a364" xlink:to="loc_andg_TRAPartiesMember_019cd17c-590b-7ddf-8b19-0c0176a6e697" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_TriggeringEventAxis_019cbe73-5a00-74e8-bb8c-79d2f1fd3349" xlink:href="andg-20251231.xsd#andg_TriggeringEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_andg_TriggeringEventAxis_019cbe73-5a00-74e8-bb8c-79d2f1fd3349" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_TriggeringEventDomain_019cbe73-5a00-74e8-bb8c-79d2f1fd3349_default" xlink:href="andg-20251231.xsd#andg_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_andg_TriggeringEventAxis_019cbe73-5a00-74e8-bb8c-79d2f1fd3349" xlink:to="loc_andg_TriggeringEventDomain_019cbe73-5a00-74e8-bb8c-79d2f1fd3349_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_TriggeringEventDomain_019cbe73-5a00-76fa-bc72-1f0601148fe7" xlink:href="andg-20251231.xsd#andg_TriggeringEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_andg_TriggeringEventAxis_019cbe73-5a00-74e8-bb8c-79d2f1fd3349" xlink:to="loc_andg_TriggeringEventDomain_019cbe73-5a00-76fa-bc72-1f0601148fe7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_IfBalanceIsAtLeast550000Member_019cbe75-3213-7e18-9421-26a010c71da9" xlink:href="andg-20251231.xsd#andg_IfBalanceIsAtLeast550000Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_TriggeringEventDomain_019cbe73-5a00-76fa-bc72-1f0601148fe7" xlink:to="loc_andg_IfBalanceIsAtLeast550000Member_019cbe75-3213-7e18-9421-26a010c71da9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_IfBalanceIsLessThan550000Member_019cbe75-c77b-7c80-961e-85498edf55f5" xlink:href="andg-20251231.xsd#andg_IfBalanceIsLessThan550000Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_TriggeringEventDomain_019cbe73-5a00-76fa-bc72-1f0601148fe7" xlink:to="loc_andg_IfBalanceIsLessThan550000Member_019cbe75-c77b-7c80-961e-85498edf55f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c70b7-a251-7ae5-add6-de3a2173e1de" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_srt_RangeAxis_019c70b7-a251-7ae5-add6-de3a2173e1de" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c70b7-a251-7ae5-add6-de3a2173e1de_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_019c70b7-a251-7ae5-add6-de3a2173e1de" xlink:to="loc_srt_RangeMember_019c70b7-a251-7ae5-add6-de3a2173e1de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c70b7-a251-7eaf-b526-bd50bde0f760" 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_019c70b7-a251-7ae5-add6-de3a2173e1de" xlink:to="loc_srt_RangeMember_019c70b7-a251-7eaf-b526-bd50bde0f760" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c70b7-a251-721c-9137-4c14ab32b6bc" 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_019c70b7-a251-7eaf-b526-bd50bde0f760" xlink:to="loc_srt_MinimumMember_019c70b7-a251-721c-9137-4c14ab32b6bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c70b7-d8e8-74b2-8c49-0f227adac722" 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_019c70b7-a251-7eaf-b526-bd50bde0f760" xlink:to="loc_srt_MaximumMember_019c70b7-d8e8-74b2-8c49-0f227adac722" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019d1104-c8f7-77c8-af2b-05afe6ba67b2" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019d1104-c8f7-77c8-af2b-05afe6ba67b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019d1104-c8f7-77c8-af2b-05afe6ba67b2_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_019d1104-c8f7-77c8-af2b-05afe6ba67b2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019d1104-c8f7-77c8-af2b-05afe6ba67b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019d1104-c8f7-71b4-a1dc-c467982b56e2" 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_019d1104-c8f7-77c8-af2b-05afe6ba67b2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019d1104-c8f7-71b4-a1dc-c467982b56e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_019d1104-c8f8-732a-b9a9-41c1964f7892" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayableOtherPayablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019d1104-c8f7-71b4-a1dc-c467982b56e2" xlink:to="loc_us-gaap_NotesPayableOtherPayablesMember_019d1104-c8f8-732a-b9a9-41c1964f7892" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019c7080-69e7-7de1-ae2a-6896f5b89903" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019c7080-69e7-7de1-ae2a-6896f5b89903" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c7080-69e7-7de1-ae2a-6896f5b89903_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019c7080-69e7-7de1-ae2a-6896f5b89903" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c7080-69e7-7de1-ae2a-6896f5b89903_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c7080-69e7-7bf4-9da6-23b719153c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019c7080-69e7-7de1-ae2a-6896f5b89903" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c7080-69e7-7bf4-9da6-23b719153c5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OverAllotmentOptionMember_019c7080-847b-7b69-8d8f-6e42b2cb66b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OverAllotmentOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c7080-69e7-7bf4-9da6-23b719153c5c" xlink:to="loc_us-gaap_OverAllotmentOptionMember_019c7080-847b-7b69-8d8f-6e42b2cb66b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IPOMember_019c70a5-2ab2-70eb-a2a5-2a3e7e3d06e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IPOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019c7080-69e7-7bf4-9da6-23b719153c5c" xlink:to="loc_us-gaap_IPOMember_019c70a5-2ab2-70eb-a2a5-2a3e7e3d06e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c70c6-b6e2-7b7b-9b90-d30787216310" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_us-gaap_PlanNameAxis_019c70c6-b6e2-7b7b-9b90-d30787216310" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c70c6-b6e2-7b7b-9b90-d30787216310_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_019c70c6-b6e2-7b7b-9b90-d30787216310" xlink:to="loc_us-gaap_PlanNameDomain_019c70c6-b6e2-7b7b-9b90-d30787216310_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c70c6-b6e2-7bf1-855c-6d20db794a44" 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_019c70c6-b6e2-7b7b-9b90-d30787216310" xlink:to="loc_us-gaap_PlanNameDomain_019c70c6-b6e2-7bf1-855c-6d20db794a44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_A2025EquityIncentivePlanMember_019c70c6-b6e2-76dd-a99d-7770fbd11582" xlink:href="andg-20251231.xsd#andg_A2025EquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c70c6-b6e2-7bf1-855c-6d20db794a44" xlink:to="loc_andg_A2025EquityIncentivePlanMember_019c70c6-b6e2-76dd-a99d-7770fbd11582" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c70f0-8fc5-790f-95e6-9056650305d4" 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_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_019ba331-b809-71ed-86c6-1647f3b46d35" xlink:to="loc_us-gaap_AwardTypeAxis_019c70f0-8fc5-790f-95e6-9056650305d4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c70f0-8fc5-790f-95e6-9056650305d4_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_019c70f0-8fc5-790f-95e6-9056650305d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c70f0-8fc5-790f-95e6-9056650305d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c70f0-8fc5-7fc7-ba42-fb91dd2bfe0e" 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_019c70f0-8fc5-790f-95e6-9056650305d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c70f0-8fc5-7fc7-ba42-fb91dd2bfe0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c70f0-b743-7521-8d7b-412a90558d33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c70f0-8fc5-7fc7-ba42-fb91dd2bfe0e" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c70f0-b743-7521-8d7b-412a90558d33" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019c70a8-cf12-7d26-ac7b-fff763def950" 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019c70a8-cf12-7d26-ac7b-fff763def950" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_NumberOfOfficesInWhichEntityOperates_019ba331-b809-75ef-867a-868433877042" xlink:href="andg-20251231.xsd#andg_NumberOfOfficesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_andg_NumberOfOfficesInWhichEntityOperates_019ba331-b809-75ef-867a-868433877042" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_019ba331-b809-7b2c-9dd9-47a5c490bcc2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_NumberOfStatesInWhichEntityOperates_019ba331-b809-7b2c-9dd9-47a5c490bcc2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019cd16f-527b-7d67-9199-0ed67a6ca1d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019cd16f-527b-7d67-9199-0ed67a6ca1d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019cd170-3d4d-7914-a3ef-b628ff86e748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019cd170-3d4d-7914-a3ef-b628ff86e748" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019cf781-09ca-7d55-9df1-0561bb368f09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019cf781-09ca-7d55-9df1-0561bb368f09" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_SaleOfStockUnderwritingDiscountsAndCommissions_019ca0cb-d4a5-79c2-b2e5-94300f0801aa" xlink:href="andg-20251231.xsd#andg_SaleOfStockUnderwritingDiscountsAndCommissions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_andg_SaleOfStockUnderwritingDiscountsAndCommissions_019ca0cb-d4a5-79c2-b2e5-94300f0801aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpenseOfferingCost_019ca0d2-2fb0-72b6-8682-1639a285898f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpenseOfferingCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_NoninterestExpenseOfferingCost_019ca0d2-2fb0-72b6-8682-1639a285898f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_MembershipInterestUnitsAcquired_019cd1a3-f4ce-7cb2-a510-27ad6b031d86" xlink:href="andg-20251231.xsd#andg_MembershipInterestUnitsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_andg_MembershipInterestUnitsAcquired_019cd1a3-f4ce-7cb2-a510-27ad6b031d86" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_CommonStockNumberOfVotes_019d1107-c38c-7a70-9918-31f4978f8a95" xlink:href="andg-20251231.xsd#andg_CommonStockNumberOfVotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_andg_CommonStockNumberOfVotes_019d1107-c38c-7a70-9918-31f4978f8a95" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019c70bc-1000-7322-9daa-eae7cd1235eb" 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_DebtInstrumentTerm_019c70bc-1000-7322-9daa-eae7cd1235eb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_DebtInstrumentPrincipalBalanceThreshold_019cbe6b-e317-7a2a-b8b4-341946e5e8a0" xlink:href="andg-20251231.xsd#andg_DebtInstrumentPrincipalBalanceThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_andg_DebtInstrumentPrincipalBalanceThreshold_019cbe6b-e317-7a2a-b8b4-341946e5e8a0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019c70b3-2acd-721d-b721-7a727d475579" 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019c70b3-2acd-721d-b721-7a727d475579" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c70b7-a251-70fb-a31b-27d6e7c94aff" 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c70b7-a251-70fb-a31b-27d6e7c94aff" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_PostServiceObligationPaymentPeriod_019d1104-c8f8-76ac-b8da-1c76b7332834" xlink:href="andg-20251231.xsd#andg_PostServiceObligationPaymentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_andg_PostServiceObligationPaymentPeriod_019d1104-c8f8-76ac-b8da-1c76b7332834" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cd177-bdb7-705b-8b13-0d9679f51c45" 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_019ba331-b809-79e7-b723-30bf64297119" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cd177-bdb7-705b-8b13-0d9679f51c45" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#SummaryofSignificantAccountingPoliciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfProductInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019befdc-10ad-7238-8403-f6cf54179ff0" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_srt_OwnershipAxis_019befdc-10ad-7238-8403-f6cf54179ff0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019befdc-10ad-7238-8403-f6cf54179ff0_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_019befdc-10ad-7238-8403-f6cf54179ff0" xlink:to="loc_srt_OwnershipDomain_019befdc-10ad-7238-8403-f6cf54179ff0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019befdc-10ad-7694-b77d-8818689970d7" 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_019befdc-10ad-7238-8403-f6cf54179ff0" xlink:to="loc_srt_OwnershipDomain_019befdc-10ad-7694-b77d-8818689970d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenTaxHoldingsLLCMember_019befdc-c8b5-71e0-bd6a-18376ddf0613" xlink:href="andg-20251231.xsd#andg_AndersenTaxHoldingsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019befdc-10ad-7694-b77d-8818689970d7" xlink:to="loc_andg_AndersenTaxHoldingsLLCMember_019befdc-c8b5-71e0-bd6a-18376ddf0613" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019bf01c-e939-794a-a5a8-87024000ff7e" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019bf01c-e939-794a-a5a8-87024000ff7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01c-e939-794a-a5a8-87024000ff7e_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_019bf01c-e939-794a-a5a8-87024000ff7e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01c-e939-794a-a5a8-87024000ff7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01d-45b3-72aa-b61f-8d9cfc96c25a" 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_019bf01c-e939-794a-a5a8-87024000ff7e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01d-45b3-72aa-b61f-8d9cfc96c25a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019bf01d-7394-7541-a9c8-0ffcf27e8125" 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_019bf01d-45b3-72aa-b61f-8d9cfc96c25a" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019bf01d-7394-7541-a9c8-0ffcf27e8125" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c715f-feb0-7a07-8711-ffc62746c26a" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c715f-feb0-7a07-8711-ffc62746c26a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7a07-8711-ffc62746c26a_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_019c715f-feb0-7a07-8711-ffc62746c26a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7a07-8711-ffc62746c26a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7d0f-9a59-707c428563e5" 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_019c715f-feb0-7a07-8711-ffc62746c26a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7d0f-9a59-707c428563e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_019c7160-5118-7419-b1f6-51e930d3024f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7d0f-9a59-707c428563e5" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_019c7160-5118-7419-b1f6-51e930d3024f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cd18c-6a57-78f5-8fc8-903f1074b2b3" 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_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cd18c-6a57-78f5-8fc8-903f1074b2b3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-78f5-8fc8-903f1074b2b3_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_019cd18c-6a57-78f5-8fc8-903f1074b2b3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-78f5-8fc8-903f1074b2b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" 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_019cd18c-6a57-78f5-8fc8-903f1074b2b3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019cd18c-8fbb-7c30-84da-f82be907a826" 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_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" xlink:to="loc_us-gaap_TradeNamesMember_019cd18c-8fbb-7c30-84da-f82be907a826" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntellectualPropertyMember_019cd18c-f287-7411-8faa-26db219e67e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntellectualPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" xlink:to="loc_us-gaap_IntellectualPropertyMember_019cd18c-f287-7411-8faa-26db219e67e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7ab9-ba3c-13fd494eabdf_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_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" xlink:to="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7ab9-ba3c-13fd494eabdf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7048-a5ae-40dc182a90a0" 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_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" xlink:to="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7048-a5ae-40dc182a90a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassXUmbrellaUnitsMember_019cfbd0-cc38-77e4-bef3-ec546632261e" xlink:href="andg-20251231.xsd#andg_ClassXUmbrellaUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7048-a5ae-40dc182a90a0" xlink:to="loc_andg_ClassXUmbrellaUnitsMember_019cfbd0-cc38-77e4-bef3-ec546632261e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019bf005-a818-737d-88c0-46b990952c80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019bf005-a818-737d-88c0-46b990952c80" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019befdc-10ad-7ac5-88c2-ee252c716b3b" 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_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019befdc-10ad-7ac5-88c2-ee252c716b3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure_019ba331-b809-7e3d-883e-dd9330ef7255" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure_019ba331-b809-7e3d-883e-dd9330ef7255" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019ba331-b809-7ad5-ab3e-b752db8b0a46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019ba331-b809-7ad5-ab3e-b752db8b0a46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019befde-26f2-7203-bc6f-1d6d1c5fd494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019befde-26f2-7203-bc6f-1d6d1c5fd494" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019d1981-d155-78ff-ac1b-d42520315b70" 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_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_NumberOfReportableSegments_019d1981-d155-78ff-ac1b-d42520315b70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_019cdabb-358f-7e1a-85c3-fecf0809d11c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_019cdabb-358f-7e1a-85c3-fecf0809d11c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019c715f-3448-74b9-a187-e8816c78ebb2" 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_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019c715f-3448-74b9-a187-e8816c78ebb2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNet_019cd186-4e16-7f78-abfb-a7b94f583db8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareNet_019cd186-4e16-7f78-abfb-a7b94f583db8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_019cd188-5ac3-7622-89e4-b8431c811290" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_019cd188-5ac3-7622-89e4-b8431c811290" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019bf012-0bd0-789f-a6bc-3b82897c62da" 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_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019bf012-0bd0-789f-a6bc-3b82897c62da" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_019beff4-05af-7a71-953a-6042bc3d401f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_019beff4-05af-7a71-953a-6042bc3d401f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss_019cd18f-cc2d-7ffc-9e22-698f890c709a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss_019cd18f-cc2d-7ffc-9e22-698f890c709a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_019cd191-ad3c-736a-a032-9012cd8c529a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_019cd191-ad3c-736a-a032-9012cd8c529a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019cd19b-8847-73af-9374-d58b74b3e8d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019cd19b-8847-73af-9374-d58b74b3e8d5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019cd19d-954f-795b-947f-0cd8a06ff5e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019cd19d-954f-795b-947f-0cd8a06ff5e2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1_019c7123-769d-7e30-9faa-325fcf482067" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1_019c7123-769d-7e30-9faa-325fcf482067" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019bf005-28a5-710d-b443-803e0cd924f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019bf005-28a5-710d-b443-803e0cd924f8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019cd195-977e-73d1-b222-6473c6abca26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019cd195-977e-73d1-b222-6473c6abca26" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_019cd1a0-9e33-7d7f-a032-e24297816b02" 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_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_AdvertisingExpense_019cd1a0-9e33-7d7f-a032-e24297816b02" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ce604-797d-75f3-b64f-551f58116170" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ce604-797d-75f3-b64f-551f58116170" xlink:type="arc" order="19"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails_1" xlink:type="simple" xlink:href="andg-20251231.xsd#SummaryofSignificantAccountingPoliciesAdditionalInformationDetails_1"/>
  <link:definitionLink xlink:role="http://andersen.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfProductInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019befdc-10ad-7238-8403-f6cf54179ff0" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_srt_OwnershipAxis_019befdc-10ad-7238-8403-f6cf54179ff0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019befdc-10ad-7238-8403-f6cf54179ff0_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_019befdc-10ad-7238-8403-f6cf54179ff0" xlink:to="loc_srt_OwnershipDomain_019befdc-10ad-7238-8403-f6cf54179ff0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019befdc-10ad-7694-b77d-8818689970d7" 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_019befdc-10ad-7238-8403-f6cf54179ff0" xlink:to="loc_srt_OwnershipDomain_019befdc-10ad-7694-b77d-8818689970d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenTaxHoldingsLLCMember_019befdc-c8b5-71e0-bd6a-18376ddf0613" xlink:href="andg-20251231.xsd#andg_AndersenTaxHoldingsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019befdc-10ad-7694-b77d-8818689970d7" xlink:to="loc_andg_AndersenTaxHoldingsLLCMember_019befdc-c8b5-71e0-bd6a-18376ddf0613" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019bf01c-e939-794a-a5a8-87024000ff7e" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019bf01c-e939-794a-a5a8-87024000ff7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01c-e939-794a-a5a8-87024000ff7e_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_019bf01c-e939-794a-a5a8-87024000ff7e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01c-e939-794a-a5a8-87024000ff7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01d-45b3-72aa-b61f-8d9cfc96c25a" 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_019bf01c-e939-794a-a5a8-87024000ff7e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019bf01d-45b3-72aa-b61f-8d9cfc96c25a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019bf01d-7394-7541-a9c8-0ffcf27e8125" 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_019bf01d-45b3-72aa-b61f-8d9cfc96c25a" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019bf01d-7394-7541-a9c8-0ffcf27e8125" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c715f-feb0-7a07-8711-ffc62746c26a" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019c715f-feb0-7a07-8711-ffc62746c26a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7a07-8711-ffc62746c26a_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_019c715f-feb0-7a07-8711-ffc62746c26a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7a07-8711-ffc62746c26a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7d0f-9a59-707c428563e5" 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_019c715f-feb0-7a07-8711-ffc62746c26a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7d0f-9a59-707c428563e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_019c7160-5118-7419-b1f6-51e930d3024f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019c715f-feb0-7d0f-9a59-707c428563e5" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_019c7160-5118-7419-b1f6-51e930d3024f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cd18c-6a57-78f5-8fc8-903f1074b2b3" 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_us-gaap_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019cd18c-6a57-78f5-8fc8-903f1074b2b3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-78f5-8fc8-903f1074b2b3_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_019cd18c-6a57-78f5-8fc8-903f1074b2b3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-78f5-8fc8-903f1074b2b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" 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_019cd18c-6a57-78f5-8fc8-903f1074b2b3" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019cd18c-8fbb-7c30-84da-f82be907a826" 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_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" xlink:to="loc_us-gaap_TradeNamesMember_019cd18c-8fbb-7c30-84da-f82be907a826" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntellectualPropertyMember_019cd18c-f287-7411-8faa-26db219e67e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntellectualPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019cd18c-6a57-7029-8103-7669419891fe" xlink:to="loc_us-gaap_IntellectualPropertyMember_019cd18c-f287-7411-8faa-26db219e67e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" 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_ScheduleOfProductInformationTable_019befdc-10ad-7036-80cd-d6be8d173e88" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7ab9-ba3c-13fd494eabdf_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_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" xlink:to="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7ab9-ba3c-13fd494eabdf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7048-a5ae-40dc182a90a0" 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_019cfbd0-752e-7ab9-ba3c-13fd494eabdf" xlink:to="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7048-a5ae-40dc182a90a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassXUmbrellaUnitsMember_019cfbd0-cc38-77e4-bef3-ec546632261e" xlink:href="andg-20251231.xsd#andg_ClassXUmbrellaUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cfbd0-752e-7048-a5ae-40dc182a90a0" xlink:to="loc_andg_ClassXUmbrellaUnitsMember_019cfbd0-cc38-77e4-bef3-ec546632261e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019befdc-10ad-7ac5-88c2-ee252c716b3b" 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_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019befdc-10ad-7ac5-88c2-ee252c716b3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure_019ba331-b809-7e3d-883e-dd9330ef7255" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure_019ba331-b809-7e3d-883e-dd9330ef7255" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019ba331-b809-7ad5-ab3e-b752db8b0a46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019ba331-b809-7ad5-ab3e-b752db8b0a46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019befde-26f2-7203-bc6f-1d6d1c5fd494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019befde-26f2-7203-bc6f-1d6d1c5fd494" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019d1981-d155-78ff-ac1b-d42520315b70" 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_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_NumberOfReportableSegments_019d1981-d155-78ff-ac1b-d42520315b70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_019cdabb-358f-7e1a-85c3-fecf0809d11c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_019cdabb-358f-7e1a-85c3-fecf0809d11c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019c715f-3448-74b9-a187-e8816c78ebb2" 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_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019c715f-3448-74b9-a187-e8816c78ebb2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareNet_019cd186-4e16-7f78-abfb-a7b94f583db8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareNet_019cd186-4e16-7f78-abfb-a7b94f583db8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_019cd188-5ac3-7622-89e4-b8431c811290" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization_019cd188-5ac3-7622-89e4-b8431c811290" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019bf012-0bd0-789f-a6bc-3b82897c62da" 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_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019bf012-0bd0-789f-a6bc-3b82897c62da" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_019beff4-05af-7a71-953a-6042bc3d401f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_019beff4-05af-7a71-953a-6042bc3d401f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss_019cd18f-cc2d-7ffc-9e22-698f890c709a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_DebtSecuritiesHeldToMaturityAllowanceForCreditLoss_019cd18f-cc2d-7ffc-9e22-698f890c709a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_019cd191-ad3c-736a-a032-9012cd8c529a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_019cd191-ad3c-736a-a032-9012cd8c529a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019cd19b-8847-73af-9374-d58b74b3e8d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019cd19b-8847-73af-9374-d58b74b3e8d5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019cd19d-954f-795b-947f-0cd8a06ff5e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019cd19d-954f-795b-947f-0cd8a06ff5e2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1_019c7123-769d-7e30-9faa-325fcf482067" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1_019c7123-769d-7e30-9faa-325fcf482067" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019bf005-28a5-710d-b443-803e0cd924f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019bf005-28a5-710d-b443-803e0cd924f8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019cd195-977e-73d1-b222-6473c6abca26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019cd195-977e-73d1-b222-6473c6abca26" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_019cd1a0-9e33-7d7f-a032-e24297816b02" 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_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_AdvertisingExpense_019cd1a0-9e33-7d7f-a032-e24297816b02" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ce604-797d-75f3-b64f-551f58116170" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_019befdc-10ad-786e-9016-c274781c8dd5" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ce604-797d-75f3-b64f-551f58116170" xlink:type="arc" order="19"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/SummaryofSignificantAccountingPoliciesScheduleofUsefulLifeDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#SummaryofSignificantAccountingPoliciesScheduleofUsefulLifeDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/SummaryofSignificantAccountingPoliciesScheduleofUsefulLifeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019befe7-a0e0-7941-aafe-28f6536e8b5a" 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_019befe7-a0e0-75b0-a354-afccd1bbdfeb" 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_019befe7-a0e0-7941-aafe-28f6536e8b5a" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019befe7-a0e0-75b0-a354-afccd1bbdfeb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019befe7-a0e0-71ff-9911-9c1dc604023c" 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_019befe7-a0e0-75b0-a354-afccd1bbdfeb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019befe7-a0e0-71ff-9911-9c1dc604023c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-71ff-9911-9c1dc604023c_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_019befe7-a0e0-71ff-9911-9c1dc604023c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-71ff-9911-9c1dc604023c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-7dbe-b406-037bfa5c9cee" 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_019befe7-a0e0-71ff-9911-9c1dc604023c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-7dbe-b406-037bfa5c9cee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019befe9-2a29-73ac-8c12-372325849ea8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-7dbe-b406-037bfa5c9cee" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019befe9-2a29-73ac-8c12-372325849ea8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OfficeEquipmentMember_019befe8-8771-77f6-bf3d-f308c1bb46ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OfficeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-7dbe-b406-037bfa5c9cee" xlink:to="loc_us-gaap_OfficeEquipmentMember_019befe8-8771-77f6-bf3d-f308c1bb46ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerEquipmentMember_019befe8-afe6-7cf2-be60-76355f58dabb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-7dbe-b406-037bfa5c9cee" xlink:to="loc_us-gaap_ComputerEquipmentMember_019befe8-afe6-7cf2-be60-76355f58dabb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_019befe9-95e3-7310-9d95-ed49e3e33d1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019befe7-a0e0-7dbe-b406-037bfa5c9cee" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_019befe9-95e3-7310-9d95-ed49e3e33d1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019befe7-a0e0-7611-8358-334ea4957cc0" 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_019befe7-a0e0-75b0-a354-afccd1bbdfeb" xlink:to="loc_srt_RangeAxis_019befe7-a0e0-7611-8358-334ea4957cc0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019befe7-a0e0-7611-8358-334ea4957cc0_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_019befe7-a0e0-7611-8358-334ea4957cc0" xlink:to="loc_srt_RangeMember_019befe7-a0e0-7611-8358-334ea4957cc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019befe7-a0e0-78ed-bcfe-1ee589150c4c" 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_019befe7-a0e0-7611-8358-334ea4957cc0" xlink:to="loc_srt_RangeMember_019befe7-a0e0-78ed-bcfe-1ee589150c4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019befea-7da8-706c-81e1-1d396d5ba613" 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_019befe7-a0e0-78ed-bcfe-1ee589150c4c" xlink:to="loc_srt_MinimumMember_019befea-7da8-706c-81e1-1d396d5ba613" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019befea-5480-7e2b-bca5-a78722860620" 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_019befe7-a0e0-78ed-bcfe-1ee589150c4c" xlink:to="loc_srt_MaximumMember_019befea-5480-7e2b-bca5-a78722860620" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019befe7-a0e0-7bfd-88af-1aef834b8f75" 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_019befe7-a0e0-7941-aafe-28f6536e8b5a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019befe7-a0e0-7bfd-88af-1aef834b8f75" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/RevenueScheduleofDisaggregationofRevenuebyTimingofRevenueRecognitionDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#RevenueScheduleofDisaggregationofRevenuebyTimingofRevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/RevenueScheduleofDisaggregationofRevenuebyTimingofRevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019ba331-b809-70e7-8029-9f83bb85f189" 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_019ba331-b809-7567-8cc3-8fc4961fea92" 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_019ba331-b809-70e7-8029-9f83bb85f189" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019ba331-b809-7567-8cc3-8fc4961fea92" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_019ba331-b809-747f-a03a-0d5449e04427" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019ba331-b809-7567-8cc3-8fc4961fea92" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_019ba331-b809-747f-a03a-0d5449e04427" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_019ba331-b809-747f-a03a-0d5449e04427_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_019ba331-b809-747f-a03a-0d5449e04427" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_019ba331-b809-747f-a03a-0d5449e04427_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_019ba331-b809-74ba-8bdf-b9fa6acc9ae0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_019ba331-b809-747f-a03a-0d5449e04427" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_019ba331-b809-74ba-8bdf-b9fa6acc9ae0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_019ba331-b809-7fcd-92e0-5ded09305250" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_019ba331-b809-74ba-8bdf-b9fa6acc9ae0" xlink:to="loc_us-gaap_TransferredOverTimeMember_019ba331-b809-7fcd-92e0-5ded09305250" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_019ba331-b809-7d46-b8d1-f438c64eda3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransferredAtPointInTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_019ba331-b809-74ba-8bdf-b9fa6acc9ae0" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_019ba331-b809-7d46-b8d1-f438c64eda3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-7af0-91e8-1a4f2911f858" 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_019ba331-b809-70e7-8029-9f83bb85f189" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-7af0-91e8-1a4f2911f858" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/RevenueScheduleofDisaggregationofRevenueByServiceLineDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#RevenueScheduleofDisaggregationofRevenueByServiceLineDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/RevenueScheduleofDisaggregationofRevenueByServiceLineDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019ba331-b809-7f34-8b57-dc17d432d4f8" 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_019ba331-b809-77e2-866f-0cf6252c1db6" 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_019ba331-b809-7f34-8b57-dc17d432d4f8" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019ba331-b809-77e2-866f-0cf6252c1db6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019ba331-b809-7762-b7dd-f74ea5f5f1cd" 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_019ba331-b809-77e2-866f-0cf6252c1db6" xlink:to="loc_srt_ProductOrServiceAxis_019ba331-b809-7762-b7dd-f74ea5f5f1cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ba331-b809-7762-b7dd-f74ea5f5f1cd_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_019ba331-b809-7762-b7dd-f74ea5f5f1cd" xlink:to="loc_srt_ProductsAndServicesDomain_019ba331-b809-7762-b7dd-f74ea5f5f1cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ba331-b809-78da-83ab-39902720abcc" 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_019ba331-b809-7762-b7dd-f74ea5f5f1cd" xlink:to="loc_srt_ProductsAndServicesDomain_019ba331-b809-78da-83ab-39902720abcc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_PrivateClientServicesMember_019ba331-b809-7078-a169-ef415734272e" xlink:href="andg-20251231.xsd#andg_PrivateClientServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ba331-b809-78da-83ab-39902720abcc" xlink:to="loc_andg_PrivateClientServicesMember_019ba331-b809-7078-a169-ef415734272e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_BusinessTaxServicesMember_019ba331-b809-75ee-9dbb-87e98de5b7f6" xlink:href="andg-20251231.xsd#andg_BusinessTaxServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ba331-b809-78da-83ab-39902720abcc" xlink:to="loc_andg_BusinessTaxServicesMember_019ba331-b809-75ee-9dbb-87e98de5b7f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AlternativeInvestmentFundsMember_019ba331-b809-782f-ac77-49671278f50c" xlink:href="andg-20251231.xsd#andg_AlternativeInvestmentFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ba331-b809-78da-83ab-39902720abcc" xlink:to="loc_andg_AlternativeInvestmentFundsMember_019ba331-b809-782f-ac77-49671278f50c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ValuationServicesMember_019ba331-b809-71e8-9927-14d3beabc338" xlink:href="andg-20251231.xsd#andg_ValuationServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ba331-b809-78da-83ab-39902720abcc" xlink:to="loc_andg_ValuationServicesMember_019ba331-b809-71e8-9927-14d3beabc338" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-7cc8-9798-a3a94065c4b0" 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_019ba331-b809-7f34-8b57-dc17d432d4f8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-7cc8-9798-a3a94065c4b0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/RevenueScheduleofDisaggregationofRevenueByRegionDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#RevenueScheduleofDisaggregationofRevenueByRegionDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/RevenueScheduleofDisaggregationofRevenueByRegionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019ba331-b809-756e-9024-20abcdddfb24" 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_019ba331-b809-7508-ba07-32208729ea97" 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_019ba331-b809-756e-9024-20abcdddfb24" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019ba331-b809-7508-ba07-32208729ea97" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019ba331-b809-74bd-9f40-e429676fb877" 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_DisaggregationOfRevenueTable_019ba331-b809-7508-ba07-32208729ea97" xlink:to="loc_srt_StatementGeographicalAxis_019ba331-b809-74bd-9f40-e429676fb877" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019ba331-b809-74bd-9f40-e429676fb877_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_019ba331-b809-74bd-9f40-e429676fb877" xlink:to="loc_srt_SegmentGeographicalDomain_019ba331-b809-74bd-9f40-e429676fb877_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019ba331-b809-7c68-968c-e23d75fac16d" 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_019ba331-b809-74bd-9f40-e429676fb877" xlink:to="loc_srt_SegmentGeographicalDomain_019ba331-b809-7c68-968c-e23d75fac16d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EastRegionMember_019ba331-b809-7eec-a029-c072397733cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EastRegionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019ba331-b809-7c68-968c-e23d75fac16d" xlink:to="loc_us-gaap_EastRegionMember_019ba331-b809-7eec-a029-c072397733cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_USCentralRegionMember_019ba331-b809-74ba-9633-29c866386901" xlink:href="andg-20251231.xsd#andg_USCentralRegionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019ba331-b809-7c68-968c-e23d75fac16d" xlink:to="loc_andg_USCentralRegionMember_019ba331-b809-74ba-9633-29c866386901" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WestRegionMember_019ba331-b809-7eb0-acf8-af29694eed7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WestRegionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019ba331-b809-7c68-968c-e23d75fac16d" xlink:to="loc_us-gaap_WestRegionMember_019ba331-b809-7eb0-acf8-af29694eed7a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-73ee-8a2e-3023a9e753cd" 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_019ba331-b809-756e-9024-20abcdddfb24" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b809-73ee-8a2e-3023a9e753cd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/AccountsReceivableNetScheduleofAllowanceforCreditLossDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#AccountsReceivableNetScheduleofAllowanceforCreditLossDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/AccountsReceivableNetScheduleofAllowanceforCreditLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019bdfcd-f902-7d10-975e-8b182cf2139b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019bdfcd-f902-7d18-96d6-8cb9ce6e3886" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019bdfcd-f902-7d10-975e-8b182cf2139b" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019bdfcd-f902-7d18-96d6-8cb9ce6e3886" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019bdfcd-f902-700c-b4a8-99198e965958" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019bdfcd-f902-7d18-96d6-8cb9ce6e3886" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019bdfcd-f902-700c-b4a8-99198e965958" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019bdfcd-f902-700c-b4a8-99198e965958_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019bdfcd-f902-700c-b4a8-99198e965958" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019bdfcd-f902-700c-b4a8-99198e965958_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019bdfcd-f902-7299-85d6-c85af42db0e9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_019bdfcd-f902-700c-b4a8-99198e965958" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019bdfcd-f902-7299-85d6-c85af42db0e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_019bdfcd-f902-71c8-a28b-dc71874653a5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_019bdfcd-f902-7299-85d6-c85af42db0e9" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_019bdfcd-f902-71c8-a28b-dc71874653a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_019ba331-b809-7ee0-b749-1f8bd46fb92b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019bdfcd-f902-7d10-975e-8b182cf2139b" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_019ba331-b809-7ee0-b749-1f8bd46fb92b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019ba331-b809-7b85-af00-69bc326434fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_019ba331-b809-7ee0-b749-1f8bd46fb92b" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019ba331-b809-7b85-af00-69bc326434fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_019ba331-b809-79d0-b7d3-282a213fd19a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_019ba331-b809-7ee0-b749-1f8bd46fb92b" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_019ba331-b809-79d0-b7d3-282a213fd19a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AccountsReceivableAllowanceForCreditLossWriteoffNetOfRecoveries_019ba331-b809-7d70-b692-c6198774f4aa" xlink:href="andg-20251231.xsd#andg_AccountsReceivableAllowanceForCreditLossWriteoffNetOfRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_019ba331-b809-7ee0-b749-1f8bd46fb92b" xlink:to="loc_andg_AccountsReceivableAllowanceForCreditLossWriteoffNetOfRecoveries_019ba331-b809-7d70-b692-c6198774f4aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019ba331-b809-7749-84ac-a3dc10640c83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/FinancialInstrumentsandFairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#FinancialInstrumentsandFairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/FinancialInstrumentsandFairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7702-9e22-ed2ff0e3987c" 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_019ba331-b809-7459-a285-81404fcb5fc6" 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_019ba331-b809-7702-9e22-ed2ff0e3987c" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-7459-a285-81404fcb5fc6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7e97-a188-bdaf4103c7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-7459-a285-81404fcb5fc6" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7e97-a188-bdaf4103c7cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7e97-a188-bdaf4103c7cb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7e97-a188-bdaf4103c7cb" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7e97-a188-bdaf4103c7cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7b72-a27a-cd6ed2fdce55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7e97-a188-bdaf4103c7cb" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7b72-a27a-cd6ed2fdce55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019ba331-b809-73a9-adb8-3a9f13753678" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7b72-a27a-cd6ed2fdce55" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019ba331-b809-73a9-adb8-3a9f13753678" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-7067-b745-0c32a73de951" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-7459-a285-81404fcb5fc6" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-7067-b745-0c32a73de951" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7067-b745-0c32a73de951_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-7067-b745-0c32a73de951" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7067-b745-0c32a73de951_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7b16-b435-fa496fbfe746" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-7067-b745-0c32a73de951" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7b16-b435-fa496fbfe746" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019ba331-b809-7a8e-a92e-592c88bb721b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7b16-b435-fa496fbfe746" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019ba331-b809-7a8e-a92e-592c88bb721b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019ba331-b809-75d2-9573-935d89340c09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7b16-b435-fa496fbfe746" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019ba331-b809-75d2-9573-935d89340c09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019ba331-b809-7b7a-89d6-eb4b812d4c52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7b16-b435-fa496fbfe746" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019ba331-b809-7b7a-89d6-eb4b812d4c52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019ba331-b809-7380-8996-c60925b7bd4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7702-9e22-ed2ff0e3987c" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019ba331-b809-7380-8996-c60925b7bd4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019ba331-b809-7563-9e9a-385f6a53b4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7702-9e22-ed2ff0e3987c" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019ba331-b809-7563-9e9a-385f6a53b4b8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/FinancialInstrumentsandFairValueMeasurementsScheduleofChangesinContingentConsiderationMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#FinancialInstrumentsandFairValueMeasurementsScheduleofChangesinContingentConsiderationMeasuredatFairValueonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/FinancialInstrumentsandFairValueMeasurementsScheduleofChangesinContingentConsiderationMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7586-bb4f-f90d750d9bd1" 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_019ba331-b809-764e-b773-985e27c5d59e" 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_019ba331-b809-7586-bb4f-f90d750d9bd1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-764e-b773-985e27c5d59e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7bc5-a794-151101bc8ea3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-764e-b773-985e27c5d59e" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7bc5-a794-151101bc8ea3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7bc5-a794-151101bc8ea3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7bc5-a794-151101bc8ea3" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-7bc5-a794-151101bc8ea3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-70bc-a38a-c597697f9826" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-7bc5-a794-151101bc8ea3" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-70bc-a38a-c597697f9826" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019ba331-b809-7433-adb9-9c997c88162e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-70bc-a38a-c597697f9826" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019ba331-b809-7433-adb9-9c997c88162e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_019ba331-b809-7d8d-bd3a-059010283c44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-764e-b773-985e27c5d59e" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_019ba331-b809-7d8d-bd3a-059010283c44" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ba331-b809-7d8d-bd3a-059010283c44_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019ba331-b809-7d8d-bd3a-059010283c44" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ba331-b809-7d8d-bd3a-059010283c44_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ba331-b809-78ce-9f4e-5bd67787b761" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019ba331-b809-7d8d-bd3a-059010283c44" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ba331-b809-78ce-9f4e-5bd67787b761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ContingentConsiderationMember_019ba331-b809-7814-996e-9473611d24c3" xlink:href="andg-20251231.xsd#andg_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ba331-b809-78ce-9f4e-5bd67787b761" xlink:to="loc_andg_ContingentConsiderationMember_019ba331-b809-7814-996e-9473611d24c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019ba331-b809-758c-b7d8-80bac1a1852c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7586-bb4f-f90d750d9bd1" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019ba331-b809-758c-b7d8-80bac1a1852c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019ba331-b809-7299-9d64-ab3575c5ce16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019ba331-b809-758c-b7d8-80bac1a1852c" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019ba331-b809-7299-9d64-ab3575c5ce16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019ba331-b809-7555-9929-57a403441ac9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019ba331-b809-758c-b7d8-80bac1a1852c" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019ba331-b809-7555-9929-57a403441ac9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019ba331-b809-750b-a5fe-f14a6e1939fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/FinancialInstrumentsandFairValueMeasurementsAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#FinancialInstrumentsandFairValueMeasurementsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/FinancialInstrumentsandFairValueMeasurementsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7e8e-bdef-5895a571c4dd" 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_019ba331-b809-7d32-9abf-c35a4c2d8b59" 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_019ba331-b809-7e8e-bdef-5895a571c4dd" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-7d32-9abf-c35a4c2d8b59" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-74a3-9a10-469d22583db9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-7d32-9abf-c35a4c2d8b59" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-74a3-9a10-469d22583db9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-74a3-9a10-469d22583db9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-74a3-9a10-469d22583db9" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-74a3-9a10-469d22583db9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-79ff-84f2-6789002138c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019ba331-b809-74a3-9a10-469d22583db9" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-79ff-84f2-6789002138c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019ba331-b809-7489-9091-c69136e793b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019ba331-b809-79ff-84f2-6789002138c3" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019ba331-b809-7489-9091-c69136e793b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-70d7-aba0-39e6c7c00622" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019ba331-b809-7d32-9abf-c35a4c2d8b59" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-70d7-aba0-39e6c7c00622" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-70d7-aba0-39e6c7c00622_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-70d7-aba0-39e6c7c00622" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-70d7-aba0-39e6c7c00622_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7d4a-ac11-da7872c482c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ba331-b809-70d7-aba0-39e6c7c00622" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7d4a-ac11-da7872c482c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019ba331-b809-7bb5-80f9-bf0d6044177c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ba331-b809-7d4a-ac11-da7872c482c9" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019ba331-b809-7bb5-80f9-bf0d6044177c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsLiabilitiesRecognized_019ba331-b809-7240-9229-6d2f1cd40c21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsLiabilitiesRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019ba331-b809-7e8e-bdef-5895a571c4dd" xlink:to="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsLiabilitiesRecognized_019ba331-b809-7240-9229-6d2f1cd40c21" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/PropertyandEquipmentNetScheduleofTotalPropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#PropertyandEquipmentNetScheduleofTotalPropertyandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/PropertyandEquipmentNetScheduleofTotalPropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019ba331-b809-7267-b604-fb4576745d3a" 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_019ba331-b809-74b0-bff3-35b7d659bb58" 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_019ba331-b809-7267-b604-fb4576745d3a" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019ba331-b809-74b0-bff3-35b7d659bb58" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019ba331-b809-7c55-8c09-9ede2ca08702" 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_019ba331-b809-74b0-bff3-35b7d659bb58" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019ba331-b809-7c55-8c09-9ede2ca08702" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-7c55-8c09-9ede2ca08702_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_019ba331-b809-7c55-8c09-9ede2ca08702" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-7c55-8c09-9ede2ca08702_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" 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_019ba331-b809-7c55-8c09-9ede2ca08702" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019ba331-b809-7c92-8e97-0d139ace0b29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019ba331-b809-7c92-8e97-0d139ace0b29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerEquipmentMember_019ba331-b809-72f3-9ef4-c91129a3bb46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:to="loc_us-gaap_ComputerEquipmentMember_019ba331-b809-72f3-9ef4-c91129a3bb46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019ba331-b809-71b2-9b80-32608e9e8d92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019ba331-b809-71b2-9b80-32608e9e8d92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_019ba331-b809-7ac6-a6ec-c0484b7be9e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_019ba331-b809-7ac6-a6ec-c0484b7be9e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OfficeEquipmentMember_019ba331-b809-75dd-8924-292bfacdbc06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OfficeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:to="loc_us-gaap_OfficeEquipmentMember_019ba331-b809-75dd-8924-292bfacdbc06" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetUnderConstructionMember_019ba331-b809-77bf-954c-cdd09f2487cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetUnderConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ba331-b809-76e8-b4ca-74618f264c05" xlink:to="loc_us-gaap_AssetUnderConstructionMember_019ba331-b809-77bf-954c-cdd09f2487cd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019ba331-b809-7d1c-8bb7-772a798f2a68" 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_019ba331-b809-7267-b604-fb4576745d3a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019ba331-b809-7d1c-8bb7-772a798f2a68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019ba331-b809-7219-b030-374045774f0e" 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_019ba331-b809-7267-b604-fb4576745d3a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019ba331-b809-7219-b030-374045774f0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019ba331-b809-7040-accb-34b2d2011e1d" 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_019ba331-b809-7267-b604-fb4576745d3a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019ba331-b809-7040-accb-34b2d2011e1d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/IntangibleAssetsNetScheduleofIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#IntangibleAssetsNetScheduleofIntangibleAssetsNetDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/IntangibleAssetsNetScheduleofIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019ba331-b809-7908-9cda-48d9fb9a9cf7" 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_019ba331-b809-7e1a-8b3d-fa426a4f99d7" 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_019ba331-b809-7908-9cda-48d9fb9a9cf7" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019ba331-b809-7e1a-8b3d-fa426a4f99d7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019ba331-b809-761f-b8de-aafd8d283632" 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_019ba331-b809-7e1a-8b3d-fa426a4f99d7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019ba331-b809-761f-b8de-aafd8d283632" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-761f-b8de-aafd8d283632_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_019ba331-b809-761f-b8de-aafd8d283632" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-761f-b8de-aafd8d283632_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7bc7-ba90-38fff16d8154" 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_019ba331-b809-761f-b8de-aafd8d283632" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7bc7-ba90-38fff16d8154" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019ba331-b809-7976-a3f3-91b0552b03dc" 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_019ba331-b809-7bc7-ba90-38fff16d8154" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019ba331-b809-7976-a3f3-91b0552b03dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_019ba331-b809-7304-bef5-379e3e8119f5" 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_019ba331-b809-7bc7-ba90-38fff16d8154" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_019ba331-b809-7304-bef5-379e3e8119f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntellectualPropertyMember_019ba331-b809-7ba5-8817-45761ff761be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntellectualPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7bc7-ba90-38fff16d8154" xlink:to="loc_us-gaap_IntellectualPropertyMember_019ba331-b809-7ba5-8817-45761ff761be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019d0cc7-ae1c-71d1-ac30-5c98118374e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7bc7-ba90-38fff16d8154" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019d0cc7-ae1c-71d1-ac30-5c98118374e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ba331-b809-7594-985f-f400eac6b230" 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_us-gaap_FiniteLivedIntangibleAssetsLineItems_019ba331-b809-7908-9cda-48d9fb9a9cf7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ba331-b809-7594-985f-f400eac6b230" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019ba331-b809-71d6-b123-aea5c9aacb39" 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_us-gaap_FiniteLivedIntangibleAssetsLineItems_019ba331-b809-7908-9cda-48d9fb9a9cf7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019ba331-b809-71d6-b123-aea5c9aacb39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ba331-b809-7482-8dcb-d3271da9ce89" 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_us-gaap_FiniteLivedIntangibleAssetsLineItems_019ba331-b809-7908-9cda-48d9fb9a9cf7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ba331-b809-7482-8dcb-d3271da9ce89" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/IntangibleAssetsNetAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#IntangibleAssetsNetAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/IntangibleAssetsNetAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019ba331-b809-7205-848d-d81fe59a962d" 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_019ba331-b809-785b-a2ab-0b1b460c48bc" 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_019ba331-b809-7205-848d-d81fe59a962d" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019ba331-b809-785b-a2ab-0b1b460c48bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019ba331-b809-7c8c-984c-90131578d1a2" 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_019ba331-b809-785b-a2ab-0b1b460c48bc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019ba331-b809-7c8c-984c-90131578d1a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7c8c-984c-90131578d1a2_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_019ba331-b809-7c8c-984c-90131578d1a2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7c8c-984c-90131578d1a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7da8-b2e8-38b24156ba05" 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_019ba331-b809-7c8c-984c-90131578d1a2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7da8-b2e8-38b24156ba05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_SoftwareInDevelopmentMember_019d0cc5-eda9-7649-948b-b5bf44afa487" xlink:href="andg-20251231.xsd#andg_SoftwareInDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019ba331-b809-7da8-b2e8-38b24156ba05" xlink:to="loc_andg_SoftwareInDevelopmentMember_019d0cc5-eda9-7649-948b-b5bf44afa487" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019ba331-b809-71ea-afdb-898b505e1366" 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_019ba331-b809-7205-848d-d81fe59a962d" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019ba331-b809-71ea-afdb-898b505e1366" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019ba331-b809-7c89-944c-670218e9de74" 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_019ba331-b809-7205-848d-d81fe59a962d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019ba331-b809-7c89-944c-670218e9de74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019cf775-9537-7b14-9f5b-24d53f634a69" 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_us-gaap_FiniteLivedIntangibleAssetsLineItems_019ba331-b809-7205-848d-d81fe59a962d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019cf775-9537-7b14-9f5b-24d53f634a69" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/IntangibleAssetsNetScheduleofEstimatedFutureAmortizationExpenseDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#IntangibleAssetsNetScheduleofEstimatedFutureAmortizationExpenseDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/IntangibleAssetsNetScheduleofEstimatedFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019d0ccc-39e0-76aa-905f-265b6d77a081" 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_019d0ccc-39e0-76a7-a66a-4e7eccb5c7d8" 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_019d0ccc-39e0-76aa-905f-265b6d77a081" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019d0ccc-39e0-76a7-a66a-4e7eccb5c7d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019d0ccc-39e0-7c12-a3a3-a91c9e7fca4c" 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_019d0ccc-39e0-76a7-a66a-4e7eccb5c7d8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019d0ccc-39e0-7c12-a3a3-a91c9e7fca4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019d0ccc-39e0-7c12-a3a3-a91c9e7fca4c_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_019d0ccc-39e0-7c12-a3a3-a91c9e7fca4c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019d0ccc-39e0-7c12-a3a3-a91c9e7fca4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019d0ccc-39e0-70e2-bf94-0b9cb286d6f4" 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_019d0ccc-39e0-7c12-a3a3-a91c9e7fca4c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019d0ccc-39e0-70e2-bf94-0b9cb286d6f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AmortizedIntangibleAssetsExcludingSoftwareInDevelopmentMember_019d0ccc-39e0-723f-86a0-655913448dea" xlink:href="andg-20251231.xsd#andg_AmortizedIntangibleAssetsExcludingSoftwareInDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019d0ccc-39e0-70e2-bf94-0b9cb286d6f4" xlink:to="loc_andg_AmortizedIntangibleAssetsExcludingSoftwareInDevelopmentMember_019d0ccc-39e0-723f-86a0-655913448dea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019d0ccc-39e0-7153-a044-d9e54853393f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019d0ccc-39e0-76aa-905f-265b6d77a081" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019d0ccc-39e0-7153-a044-d9e54853393f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019d0ccc-39e0-72ac-848c-2f5560eaa41e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019d0ccc-39e0-76aa-905f-265b6d77a081" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019d0ccc-39e0-72ac-848c-2f5560eaa41e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019d0ccc-39e0-75ca-8e4b-c7bbddb6f566" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019d0ccc-39e0-76aa-905f-265b6d77a081" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019d0ccc-39e0-75ca-8e4b-c7bbddb6f566" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearThree_019d0ccc-39e0-739d-9272-91bcc755d5bf" xlink:href="andg-20251231.xsd#andg_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019d0ccc-39e0-76aa-905f-265b6d77a081" xlink:to="loc_andg_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearThree_019d0ccc-39e0-739d-9272-91bcc755d5bf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019d0ccc-39e0-7204-bc21-03ce572f6d09" 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_us-gaap_FiniteLivedIntangibleAssetsLineItems_019d0ccc-39e0-76aa-905f-265b6d77a081" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019d0ccc-39e0-7204-bc21-03ce572f6d09" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/OtherBalanceSheetComponentsScheduleofOtherCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#OtherBalanceSheetComponentsScheduleofOtherCurrentLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/OtherBalanceSheetComponentsScheduleofOtherCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:href="andg-20251231.xsd#andg_SupplementalBalanceSheetDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_SupplementalBalanceSheetDisclosuresTable_019ba331-b80a-700b-89d2-0d5308e39a6d" xlink:href="andg-20251231.xsd#andg_SupplementalBalanceSheetDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_andg_SupplementalBalanceSheetDisclosuresTable_019ba331-b80a-700b-89d2-0d5308e39a6d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019ba331-b80a-71ac-a2b5-70663e83f51c" 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_andg_SupplementalBalanceSheetDisclosuresTable_019ba331-b80a-700b-89d2-0d5308e39a6d" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019ba331-b80a-71ac-a2b5-70663e83f51c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-71ac-a2b5-70663e83f51c_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_019ba331-b80a-71ac-a2b5-70663e83f51c" xlink:to="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-71ac-a2b5-70663e83f51c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7d2f-b8c3-0a5723941ed2" 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_019ba331-b80a-71ac-a2b5-70663e83f51c" xlink:to="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7d2f-b8c3-0a5723941ed2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019ba331-b80a-77f5-9179-4a3c9d7b59a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7d2f-b8c3-0a5723941ed2" xlink:to="loc_us-gaap_RelatedPartyMember_019ba331-b80a-77f5-9179-4a3c9d7b59a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019d110e-4026-7489-8c2a-5deaac549710" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7d2f-b8c3-0a5723941ed2" xlink:to="loc_us-gaap_NonrelatedPartyMember_019d110e-4026-7489-8c2a-5deaac549710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrent_019ba331-b80a-7cb2-9d13-5f29e05c3a55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrent_019ba331-b80a-7cb2-9d13-5f29e05c3a55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSundryLiabilitiesCurrent_019ba331-b80a-7dd5-8445-9992baece5b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherSundryLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_OtherSundryLiabilitiesCurrent_019ba331-b80a-7dd5-8445-9992baece5b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_BusinessCombinationSeparatelyRecognizedTransactionsDeferredConsiderationCurrent_019ba331-b80a-72d9-9e11-aeab5d1b27dd" xlink:href="andg-20251231.xsd#andg_BusinessCombinationSeparatelyRecognizedTransactionsDeferredConsiderationCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_andg_BusinessCombinationSeparatelyRecognizedTransactionsDeferredConsiderationCurrent_019ba331-b80a-72d9-9e11-aeab5d1b27dd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_019ba331-b80a-7501-a3eb-7d50171d0009" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_019ba331-b80a-7501-a3eb-7d50171d0009" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_019d1110-9798-74a6-85aa-235d265359c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_019d1110-9798-74a6-85aa-235d265359c2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_019ba331-b80a-7dd5-9cce-e6eebda2bd29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_019ba331-b80a-7dd5-9cce-e6eebda2bd29" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_019ba331-b80a-7f25-9447-78ef14cfab14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_019ba331-b80a-7f25-9447-78ef14cfab14" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019ba331-b80a-7b2a-a2b8-45786c1edcdc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_andg_SupplementalBalanceSheetDisclosuresLineItems_019ba331-b80a-7b39-8807-b89b4c29ed70" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019ba331-b80a-7b2a-a2b8-45786c1edcdc" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#LongTermDebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" 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_019ba331-b80a-70bd-bafb-51f028a65f32" 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_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_DebtInstrumentTable_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019ba331-b80a-75e8-950c-7abb32f251d0" 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_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_us-gaap_DebtInstrumentAxis_019ba331-b80a-75e8-950c-7abb32f251d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-75e8-950c-7abb32f251d0_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_019ba331-b80a-75e8-950c-7abb32f251d0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-75e8-950c-7abb32f251d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-7cd8-b4dd-988336b0e449" 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_019ba331-b80a-75e8-950c-7abb32f251d0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-7cd8-b4dd-988336b0e449" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_CreditAgreementMember_019ba331-b80a-72cd-9bb3-9700b156f0b0" xlink:href="andg-20251231.xsd#andg_CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-7cd8-b4dd-988336b0e449" xlink:to="loc_andg_CreditAgreementMember_019ba331-b80a-72cd-9bb3-9700b156f0b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_CapitalAccountNotesMember_019c702b-aa63-7e44-8cc4-282643c2d1f5" xlink:href="andg-20251231.xsd#andg_CapitalAccountNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-7cd8-b4dd-988336b0e449" xlink:to="loc_andg_CapitalAccountNotesMember_019c702b-aa63-7e44-8cc4-282643c2d1f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_HoldoverNoteMember_019c7033-0232-738e-ae70-a5f316cb5437" xlink:href="andg-20251231.xsd#andg_HoldoverNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ba331-b80a-7cd8-b4dd-988336b0e449" xlink:to="loc_andg_HoldoverNoteMember_019c7033-0232-738e-ae70-a5f316cb5437" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019ba331-b80a-74ea-8f51-e4536a70ec29" 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_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019ba331-b80a-74ea-8f51-e4536a70ec29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ba331-b80a-74ea-8f51-e4536a70ec29_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_019ba331-b80a-74ea-8f51-e4536a70ec29" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ba331-b80a-74ea-8f51-e4536a70ec29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ba331-b80a-7fd8-b904-e8eb9c8a2930" 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_019ba331-b80a-74ea-8f51-e4536a70ec29" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ba331-b80a-7fd8-b904-e8eb9c8a2930" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019ba331-b80a-7a40-8fa7-d404bf51a6cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ba331-b80a-7fd8-b904-e8eb9c8a2930" xlink:to="loc_us-gaap_LineOfCreditMember_019ba331-b80a-7a40-8fa7-d404bf51a6cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_019d0643-3b40-767b-a552-da5e73375e3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayableOtherPayablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ba331-b80a-7fd8-b904-e8eb9c8a2930" xlink:to="loc_us-gaap_NotesPayableOtherPayablesMember_019d0643-3b40-767b-a552-da5e73375e3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019ba331-b80a-78a8-b0f5-23eec03449ec" 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_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_us-gaap_CreditFacilityAxis_019ba331-b80a-78a8-b0f5-23eec03449ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019ba331-b80a-78a8-b0f5-23eec03449ec_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_019ba331-b80a-78a8-b0f5-23eec03449ec" xlink:to="loc_us-gaap_CreditFacilityDomain_019ba331-b80a-78a8-b0f5-23eec03449ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019ba331-b80a-79dd-b7fd-1feb297fdcb0" 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_019ba331-b80a-78a8-b0f5-23eec03449ec" xlink:to="loc_us-gaap_CreditFacilityDomain_019ba331-b80a-79dd-b7fd-1feb297fdcb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019ba331-b80a-75a9-b26d-b3abcc64b249" 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_019ba331-b80a-79dd-b7fd-1feb297fdcb0" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019ba331-b80a-75a9-b26d-b3abcc64b249" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_019ba331-b80a-7192-980a-f294ecd23004" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StandbyLettersOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019ba331-b80a-79dd-b7fd-1feb297fdcb0" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_019ba331-b80a-7192-980a-f294ecd23004" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cd25d-124c-78ae-b2a8-275d82b3c1bd" 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_DebtInstrumentTable_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_dei_LegalEntityAxis_019cd25d-124c-78ae-b2a8-275d82b3c1bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cd25d-124c-78ae-b2a8-275d82b3c1bd_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_019cd25d-124c-78ae-b2a8-275d82b3c1bd" xlink:to="loc_dei_EntityDomain_019cd25d-124c-78ae-b2a8-275d82b3c1bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cd25d-124c-7af1-8fcb-2d2b3085aa3c" 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_019cd25d-124c-78ae-b2a8-275d82b3c1bd" xlink:to="loc_dei_EntityDomain_019cd25d-124c-7af1-8fcb-2d2b3085aa3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCMember_019cd25d-95cd-7964-864a-4f8864e8042b" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cd25d-124c-7af1-8fcb-2d2b3085aa3c" xlink:to="loc_andg_ATUmbrellaLLCMember_019cd25d-95cd-7964-864a-4f8864e8042b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cdb7d-a47b-782b-aabd-f58967828f3e" 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_DebtInstrumentTable_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_us-gaap_AwardTypeAxis_019cdb7d-a47b-782b-aabd-f58967828f3e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cdb7d-a47b-782b-aabd-f58967828f3e_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_019cdb7d-a47b-782b-aabd-f58967828f3e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cdb7d-a47b-782b-aabd-f58967828f3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cdb7d-a47b-7323-9e44-84787dea4047" 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_019cdb7d-a47b-782b-aabd-f58967828f3e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cdb7d-a47b-7323-9e44-84787dea4047" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassHAggregatorUnitsMember_019cdb7d-a47b-7819-b7d1-29916761275f" xlink:href="andg-20251231.xsd#andg_ClassHAggregatorUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cdb7d-a47b-7323-9e44-84787dea4047" xlink:to="loc_andg_ClassHAggregatorUnitsMember_019cdb7d-a47b-7819-b7d1-29916761275f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassXAggregatorUnitsMember_019d0cde-5765-7200-b468-174e0bb32a0a" xlink:href="andg-20251231.xsd#andg_ClassXAggregatorUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cdb7d-a47b-7323-9e44-84787dea4047" xlink:to="loc_andg_ClassXAggregatorUnitsMember_019d0cde-5765-7200-b468-174e0bb32a0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019cdb7d-a47b-7920-a691-cf8256894604" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019cdb7d-a47b-7920-a691-cf8256894604" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019cdb7d-a47b-7920-a691-cf8256894604_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019cdb7d-a47b-7920-a691-cf8256894604" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019cdb7d-a47b-7920-a691-cf8256894604_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019cdb7d-a47b-7798-b382-9feff3dbafc4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019cdb7d-a47b-7920-a691-cf8256894604" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019cdb7d-a47b-7798-b382-9feff3dbafc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IPOMember_019cdb7d-a47b-7fba-8c74-4e70ef5736bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IPOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019cdb7d-a47b-7798-b382-9feff3dbafc4" xlink:to="loc_us-gaap_IPOMember_019cdb7d-a47b-7fba-8c74-4e70ef5736bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c7040-7934-77ea-a3db-9e5b85f73bc1" 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_019ba331-b80a-70bd-bafb-51f028a65f32" xlink:to="loc_srt_RangeAxis_019c7040-7934-77ea-a3db-9e5b85f73bc1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c7040-7934-77ea-a3db-9e5b85f73bc1_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_019c7040-7934-77ea-a3db-9e5b85f73bc1" xlink:to="loc_srt_RangeMember_019c7040-7934-77ea-a3db-9e5b85f73bc1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c7040-7934-7be1-a31e-0430ae7ae497" 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_019c7040-7934-77ea-a3db-9e5b85f73bc1" xlink:to="loc_srt_RangeMember_019c7040-7934-7be1-a31e-0430ae7ae497" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c7040-ae74-71fb-af12-a498db9bbebb" 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_019c7040-7934-7be1-a31e-0430ae7ae497" xlink:to="loc_srt_MinimumMember_019c7040-ae74-71fb-af12-a498db9bbebb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c7040-dea7-795d-a44b-1daa7ad82005" 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_019c7040-7934-7be1-a31e-0430ae7ae497" xlink:to="loc_srt_MaximumMember_019c7040-dea7-795d-a44b-1daa7ad82005" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019ba331-b80a-7049-a34e-20a25aaf8b59" 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_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019ba331-b80a-7049-a34e-20a25aaf8b59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_DebtInstrumentFloorInterestRate_019ba331-b80a-7f66-bd27-9012932daf17" xlink:href="andg-20251231.xsd#andg_DebtInstrumentFloorInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_andg_DebtInstrumentFloorInterestRate_019ba331-b80a-7f66-bd27-9012932daf17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019ba331-b80a-7eab-91aa-62e6cfc297d3" 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_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019ba331-b80a-7eab-91aa-62e6cfc297d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_019ba331-b80a-7438-b02c-6689de3b73a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_019ba331-b80a-7438-b02c-6689de3b73a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019ba331-b80a-7ee9-98a2-5b2321ffd9b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019ba331-b80a-7ee9-98a2-5b2321ffd9b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeeAmount_019ba331-b80a-78e5-9ff3-f464964a1ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeeAmount_019ba331-b80a-78e5-9ff3-f464964a1ee5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019c701b-ef02-7e91-a8af-79933e86ff22" 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_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019c701b-ef02-7e91-a8af-79933e86ff22" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019d0648-67fc-7c3f-a1ea-0e22f44d7a5d" xlink:href="andg-20251231.xsd#andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019d0648-67fc-7c3f-a1ea-0e22f44d7a5d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_DebtInstrumentAmortizationPeriod_019cdb79-64f5-785b-853b-21e46289b9c9" xlink:href="andg-20251231.xsd#andg_DebtInstrumentAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_andg_DebtInstrumentAmortizationPeriod_019cdb79-64f5-785b-853b-21e46289b9c9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_PostServiceObligationPaymentPeriod_019d0cd3-b678-71b3-b06a-a50e3cc638ee" xlink:href="andg-20251231.xsd#andg_PostServiceObligationPaymentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_andg_PostServiceObligationPaymentPeriod_019d0cd3-b678-71b3-b06a-a50e3cc638ee" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019d064e-d337-763f-b848-a40d35a9bd20" 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_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_DebtInstrumentTerm_019d064e-d337-763f-b848-a40d35a9bd20" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c7032-064a-7e9d-b21c-45f1fcf0fdcf" 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_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c7032-064a-7e9d-b21c-45f1fcf0fdcf" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019c7033-c4fb-7b5e-b8cc-e87e6eadc996" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019ba331-b80a-7546-bead-e5428ea42d20" xlink:to="loc_us-gaap_InterestExpenseDebt_019c7033-c4fb-7b5e-b8cc-e87e6eadc996" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/EmployeeCompensationandBenefitsDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#EmployeeCompensationandBenefitsDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/EmployeeCompensationandBenefitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019ba331-b80a-743f-8395-e7a277c67b4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019ba331-b80a-743f-8395-e7a277c67b4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cdbf9-8a3d-73bf-a071-a0f779325313" 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_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019ba331-b80a-743f-8395-e7a277c67b4c" xlink:to="loc_srt_RangeAxis_019cdbf9-8a3d-73bf-a071-a0f779325313" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cdbf9-8a3d-73bf-a071-a0f779325313_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_019cdbf9-8a3d-73bf-a071-a0f779325313" xlink:to="loc_srt_RangeMember_019cdbf9-8a3d-73bf-a071-a0f779325313_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cdbf9-8a3d-722e-96be-1f5d4fbbef9f" 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_019cdbf9-8a3d-73bf-a071-a0f779325313" xlink:to="loc_srt_RangeMember_019cdbf9-8a3d-722e-96be-1f5d4fbbef9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cdbf9-8a3d-75fe-b0bb-8c5921904b44" 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_019cdbf9-8a3d-722e-96be-1f5d4fbbef9f" xlink:to="loc_srt_MinimumMember_019cdbf9-8a3d-75fe-b0bb-8c5921904b44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cdbf9-8a3d-7a24-8869-8ec469ef81b2" 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_019cdbf9-8a3d-722e-96be-1f5d4fbbef9f" xlink:to="loc_srt_MaximumMember_019cdbf9-8a3d-7a24-8869-8ec469ef81b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019cdbf9-8a3d-7c4d-add1-b19f3efe557d" 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_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019ba331-b80a-743f-8395-e7a277c67b4c" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_019cdbf9-8a3d-7c4d-add1-b19f3efe557d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-7c4d-add1-b19f3efe557d_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_019cdbf9-8a3d-7c4d-add1-b19f3efe557d" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-7c4d-add1-b19f3efe557d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-730b-a3a8-fa17c6d89441" 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_019cdbf9-8a3d-7c4d-add1-b19f3efe557d" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-730b-a3a8-fa17c6d89441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_LoyaltyRetentionProgramMember_019cdbf9-8a3d-7fad-9958-27c67aa58bad" xlink:href="andg-20251231.xsd#andg_LoyaltyRetentionProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-730b-a3a8-fa17c6d89441" xlink:to="loc_andg_LoyaltyRetentionProgramMember_019cdbf9-8a3d-7fad-9958-27c67aa58bad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_NonPartnerEmployeesDirectorMember_019cdbf9-8a3d-7620-baf5-195c6bd344eb" xlink:href="andg-20251231.xsd#andg_NonPartnerEmployeesDirectorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-730b-a3a8-fa17c6d89441" xlink:to="loc_andg_NonPartnerEmployeesDirectorMember_019cdbf9-8a3d-7620-baf5-195c6bd344eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_FixedBonusPercentageBasedOnRevenuesGeneratedMember_019cdbf9-ba6f-77d6-b846-c738b9e8cf99" xlink:href="andg-20251231.xsd#andg_FixedBonusPercentageBasedOnRevenuesGeneratedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-730b-a3a8-fa17c6d89441" xlink:to="loc_andg_FixedBonusPercentageBasedOnRevenuesGeneratedMember_019cdbf9-ba6f-77d6-b846-c738b9e8cf99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AgreementsPriorToSettlementInLTIPUnitsMember_019cdbf9-ba6f-7c7b-8bd8-95d533c4ff27" xlink:href="andg-20251231.xsd#andg_AgreementsPriorToSettlementInLTIPUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_019cdbf9-8a3d-730b-a3a8-fa17c6d89441" xlink:to="loc_andg_AgreementsPriorToSettlementInLTIPUnitsMember_019cdbf9-ba6f-7c7b-8bd8-95d533c4ff27" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cdbf9-8a3d-7db3-9cae-e85ea3814d3b" 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_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_019ba331-b80a-743f-8395-e7a277c67b4c" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cdbf9-8a3d-7db3-9cae-e85ea3814d3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cdbf9-8a3d-7db3-9cae-e85ea3814d3b_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_019cdbf9-8a3d-7db3-9cae-e85ea3814d3b" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cdbf9-8a3d-7db3-9cae-e85ea3814d3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cdbf9-8a3d-74c8-8e88-816aa013ae51" 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_019cdbf9-8a3d-7db3-9cae-e85ea3814d3b" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cdbf9-8a3d-74c8-8e88-816aa013ae51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cdbf9-8a3d-7f3a-bda1-efc081e46909" 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_019cdbf9-8a3d-74c8-8e88-816aa013ae51" xlink:to="loc_us-gaap_CostOfSalesMember_019cdbf9-8a3d-7f3a-bda1-efc081e46909" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cdbf9-8a3d-72f9-b711-5f144671dbac" 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_019cdbf9-8a3d-74c8-8e88-816aa013ae51" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cdbf9-8a3d-72f9-b711-5f144671dbac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_019cdbf9-8a3d-79dd-801d-bf64cc01323f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_019cdbf9-8a3d-79dd-801d-bf64cc01323f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid_019cdbf9-8a3d-79d1-9934-49caea3794dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid_019cdbf9-8a3d-79d1-9934-49caea3794dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_019cdbf9-8a3d-7129-9525-4d635ef5729e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_019cdbf9-8a3d-7129-9525-4d635ef5729e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_019cdbf9-8a3d-7335-8e6d-d4134532a559" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_019cdbf9-8a3d-7335-8e6d-d4134532a559" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrent_019cdbf9-ba6f-7e54-9ce3-f0dfa231cab3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrent_019cdbf9-ba6f-7e54-9ce3-f0dfa231cab3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019cdbf9-ba6f-74ef-b073-b35d706ccc9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019cdbf9-ba6f-74ef-b073-b35d706ccc9f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_DeferredCompensationArrangementVestingPeriod_019cdbf9-ba6f-7ce7-80db-d9ee546fb639" xlink:href="andg-20251231.xsd#andg_DeferredCompensationArrangementVestingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_andg_DeferredCompensationArrangementVestingPeriod_019cdbf9-ba6f-7ce7-80db-d9ee546fb639" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_019d0653-4fb1-756d-ab99-084825ddc66e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_019d0653-4fb1-756d-ab99-084825ddc66e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_019cdbf9-ddb6-71ea-82a9-50f8991f44f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_019cdbf9-ddb6-71ea-82a9-50f8991f44f3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_019cdbf9-ddb6-7e31-8d98-2007cdef32f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_019cdbf9-ddb6-7e31-8d98-2007cdef32f6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_DefinedContributionPlanMaximumAnnualContributionsPerEmployerPercent_019cdbf9-ddb6-7ee0-971a-c3707bd3389a" xlink:href="andg-20251231.xsd#andg_DefinedContributionPlanMaximumAnnualContributionsPerEmployerPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_andg_DefinedContributionPlanMaximumAnnualContributionsPerEmployerPercent_019cdbf9-ddb6-7ee0-971a-c3707bd3389a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_019cdbf9-ddb6-71e7-821c-57c4d8b2beb8" 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_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019cdbf9-8a3d-7781-bd3c-39b2caa91564" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_019cdbf9-ddb6-71e7-821c-57c4d8b2beb8" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/LeasesAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#LeasesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/LeasesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c705d-5c32-7ef3-9804-e35cf19e0927" 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_019beac7-029c-77be-8900-07cbbbe84c0e" 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_019c705d-5c32-7ef3-9804-e35cf19e0927" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019beac7-029c-77be-8900-07cbbbe84c0e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_019c705d-5c32-7ccc-8ec5-aed440546c90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019beac7-029c-77be-8900-07cbbbe84c0e" xlink:to="loc_us-gaap_LeaseContractualTermAxis_019c705d-5c32-7ccc-8ec5-aed440546c90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_019c705d-5c32-7ccc-8ec5-aed440546c90_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_019c705d-5c32-7ccc-8ec5-aed440546c90" xlink:to="loc_us-gaap_LeaseContractualTermDomain_019c705d-5c32-7ccc-8ec5-aed440546c90_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_019c705d-5c32-7b74-837b-4a62d3383748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_019c705d-5c32-7ccc-8ec5-aed440546c90" xlink:to="loc_us-gaap_LeaseContractualTermDomain_019c705d-5c32-7b74-837b-4a62d3383748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_NewLeaseTermsMember_019cd177-46fc-7f1b-a893-7b57e40c027f" xlink:href="andg-20251231.xsd#andg_NewLeaseTermsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_019c705d-5c32-7b74-837b-4a62d3383748" xlink:to="loc_andg_NewLeaseTermsMember_019cd177-46fc-7f1b-a893-7b57e40c027f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_OfficeLeasesToExtendLeaseTermMember_019c705d-5c32-719a-8062-3ab2541e68fe" xlink:href="andg-20251231.xsd#andg_OfficeLeasesToExtendLeaseTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_019c705d-5c32-7b74-837b-4a62d3383748" xlink:to="loc_andg_OfficeLeasesToExtendLeaseTermMember_019c705d-5c32-719a-8062-3ab2541e68fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_LesseeOperatingLeaseNumberOfContracts_019c705d-5c32-7714-bb49-899c39c5bb40" xlink:href="andg-20251231.xsd#andg_LesseeOperatingLeaseNumberOfContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c705d-5c32-7ef3-9804-e35cf19e0927" xlink:to="loc_andg_LesseeOperatingLeaseNumberOfContracts_019c705d-5c32-7714-bb49-899c39c5bb40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019c705d-5c32-7b0c-a677-552f4d268244" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c705d-5c32-7ef3-9804-e35cf19e0927" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019c705d-5c32-7b0c-a677-552f4d268244" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_IncreaseDecreaseInOperatingRightOfUseAssets_019c705d-5c32-7808-a3ec-387453c1ae27" xlink:href="andg-20251231.xsd#andg_IncreaseDecreaseInOperatingRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c705d-5c32-7ef3-9804-e35cf19e0927" xlink:to="loc_andg_IncreaseDecreaseInOperatingRightOfUseAssets_019c705d-5c32-7808-a3ec-387453c1ae27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019c705d-7c35-7ce8-9c55-9eeb2266a5f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c705d-5c32-7ef3-9804-e35cf19e0927" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019c705d-7c35-7ce8-9c55-9eeb2266a5f8" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/StockholdersEquityDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#StockholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/StockholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019c7040-c8fe-732e-80af-19f777195367" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019c7040-c8fe-732e-80af-19f777195367" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c7040-c8fe-7603-bf48-0fc097d59840" 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_ScheduleOfStockByClassTable_019c7040-c8fe-732e-80af-19f777195367" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c7040-c8fe-7603-bf48-0fc097d59840" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7603-bf48-0fc097d59840_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_019c7040-c8fe-7603-bf48-0fc097d59840" xlink:to="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7603-bf48-0fc097d59840_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7caa-9648-d7db0c1b38d7" 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_019c7040-c8fe-7603-bf48-0fc097d59840" xlink:to="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7caa-9648-d7db0c1b38d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c7040-c8fe-7f9f-881c-313ede1e87b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7caa-9648-d7db0c1b38d7" xlink:to="loc_us-gaap_CommonClassAMember_019c7040-c8fe-7f9f-881c-313ede1e87b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019c7040-c8fe-7b7a-8994-9d1ec940e7b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7caa-9648-d7db0c1b38d7" xlink:to="loc_us-gaap_CommonClassBMember_019c7040-c8fe-7b7a-8994-9d1ec940e7b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassXUmbrellaUnitsMember_019d0665-05ec-7460-b666-b53306ab3862" xlink:href="andg-20251231.xsd#andg_ClassXUmbrellaUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c7040-c8fe-7caa-9648-d7db0c1b38d7" xlink:to="loc_andg_ClassXUmbrellaUnitsMember_019d0665-05ec-7460-b666-b53306ab3862" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019d0666-b549-7fc3-87de-e70c4da6b699" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c7040-c8fe-732e-80af-19f777195367" xlink:to="loc_srt_CounterpartyNameAxis_019d0666-b549-7fc3-87de-e70c4da6b699" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7fc3-87de-e70c4da6b699_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019d0666-b549-7fc3-87de-e70c4da6b699" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7fc3-87de-e70c4da6b699_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7c92-a3e1-1e47265980ab" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019d0666-b549-7fc3-87de-e70c4da6b699" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7c92-a3e1-1e47265980ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersonGroupIncMember_019d0667-0c9c-7ca2-a3cd-33ebf57f2d79" xlink:href="andg-20251231.xsd#andg_AndersonGroupIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7c92-a3e1-1e47265980ab" xlink:to="loc_andg_AndersonGroupIncMember_019d0667-0c9c-7ca2-a3cd-33ebf57f2d79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenAggregatorLLCMember_019d066a-49a6-7bdd-8963-a9282975b777" xlink:href="andg-20251231.xsd#andg_AndersenAggregatorLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7c92-a3e1-1e47265980ab" xlink:to="loc_andg_AndersenAggregatorLLCMember_019d066a-49a6-7bdd-8963-a9282975b777" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenAggregatorLLCOnBehalfOfDirectorsMember_019d066c-39a4-7a5c-9e56-900ca77368bd" xlink:href="andg-20251231.xsd#andg_AndersenAggregatorLLCOnBehalfOfDirectorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019d0666-b549-7c92-a3e1-1e47265980ab" xlink:to="loc_andg_AndersenAggregatorLLCOnBehalfOfDirectorsMember_019d066c-39a4-7a5c-9e56-900ca77368bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cd30c-1f6b-77f0-8d30-3b15231bb8f5" 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_ScheduleOfStockByClassTable_019c7040-c8fe-732e-80af-19f777195367" xlink:to="loc_dei_LegalEntityAxis_019cd30c-1f6b-77f0-8d30-3b15231bb8f5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cd30c-1f6b-77f0-8d30-3b15231bb8f5_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_019cd30c-1f6b-77f0-8d30-3b15231bb8f5" xlink:to="loc_dei_EntityDomain_019cd30c-1f6b-77f0-8d30-3b15231bb8f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cd30c-1f6b-7d3d-808b-479f1884ad7e" 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_019cd30c-1f6b-77f0-8d30-3b15231bb8f5" xlink:to="loc_dei_EntityDomain_019cd30c-1f6b-7d3d-808b-479f1884ad7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCMember_019cd30c-614c-76e4-96b5-31e42d36d2ac" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cd30c-1f6b-7d3d-808b-479f1884ad7e" xlink:to="loc_andg_ATUmbrellaLLCMember_019cd30c-614c-76e4-96b5-31e42d36d2ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019c7040-c8fe-7567-9eda-ab1fc955b423" 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_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019c7040-c8fe-7567-9eda-ab1fc955b423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c7040-c8fe-7e82-a52c-02f739bab077" 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_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c7040-c8fe-7e82-a52c-02f739bab077" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019c7040-c8fe-7a91-b190-9a4602c5eb5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019c7040-c8fe-7a91-b190-9a4602c5eb5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c7040-c8ff-7a8f-94a3-47e36c2bb426" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c7040-c8ff-7a8f-94a3-47e36c2bb426" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_CommonStockNumberOfVotes_019d065d-5ed1-78f4-9eec-577762dda6f5" xlink:href="andg-20251231.xsd#andg_CommonStockNumberOfVotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_andg_CommonStockNumberOfVotes_019d065d-5ed1-78f4-9eec-577762dda6f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019c7042-cce3-7d84-ac79-4c627787dd10" 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_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_CommonStockSharesIssued_019c7042-cce3-7d84-ac79-4c627787dd10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c7042-cce3-7e40-aaeb-0e6564e42460" 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_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c7042-cce3-7e40-aaeb-0e6564e42460" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_019c7082-84da-7568-85f4-3886b4539a28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_PreferredStockSharesIssued_019c7082-84da-7568-85f4-3886b4539a28" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_019d0660-b510-7f22-85b7-cf86cc3da220" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Dividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_Dividends_019d0660-b510-7f22-85b7-cf86cc3da220" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_019d0662-1471-7f7d-a6b0-983fdf8ecfe5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_PaymentsOfDividends_019d0662-1471-7f7d-a6b0-983fdf8ecfe5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonUnitOutstanding_019d0663-a176-7b7a-b0fd-977c9b11ad95" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonUnitOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c7040-c8fe-7fb6-a4c8-f745f11f963e" xlink:to="loc_us-gaap_CommonUnitOutstanding_019d0663-a176-7b7a-b0fd-977c9b11ad95" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/EquityBasedCompensationAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#EquityBasedCompensationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/EquityBasedCompensationAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" 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_019ba331-b80a-789e-b973-c48ce6fbba3c" 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_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019ba331-b80a-789e-b973-c48ce6fbba3c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cc214-e01c-782a-b6c8-de0d3b38f976" 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_019ba331-b80a-789e-b973-c48ce6fbba3c" xlink:to="loc_us-gaap_AwardTypeAxis_019cc214-e01c-782a-b6c8-de0d3b38f976" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-782a-b6c8-de0d3b38f976_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_019cc214-e01c-782a-b6c8-de0d3b38f976" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-782a-b6c8-de0d3b38f976_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" 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_019cc214-e01c-782a-b6c8-de0d3b38f976" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ProfitsInterestUnitsPIUsMember_019cc214-e01c-72e4-9b14-a123d3cefd05" xlink:href="andg-20251231.xsd#andg_ProfitsInterestUnitsPIUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" xlink:to="loc_andg_ProfitsInterestUnitsPIUsMember_019cc214-e01c-72e4-9b14-a123d3cefd05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCLTIPUnitsMember_019cc215-13b8-7806-920a-359820ddb81b" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCLTIPUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" xlink:to="loc_andg_ATUmbrellaLLCLTIPUnitsMember_019cc215-13b8-7806-920a-359820ddb81b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019cc215-13b8-728e-87d8-901dda6a2a5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019cc215-13b8-728e-87d8-901dda6a2a5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassXAggregatorUnitsMember_019cc215-775a-78dc-b8fb-b54787988384" xlink:href="andg-20251231.xsd#andg_ClassXAggregatorUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" xlink:to="loc_andg_ClassXAggregatorUnitsMember_019cc215-775a-78dc-b8fb-b54787988384" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassHAggregatorUnitsMember_019cc215-95b8-74e2-84b1-1e14ec936a9e" xlink:href="andg-20251231.xsd#andg_ClassHAggregatorUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cc214-e01c-7264-86ac-e99503cc8aab" xlink:to="loc_andg_ClassHAggregatorUnitsMember_019cc215-95b8-74e2-84b1-1e14ec936a9e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cc214-e01c-73cd-9e44-d5367f334957" 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_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019ba331-b80a-789e-b973-c48ce6fbba3c" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cc214-e01c-73cd-9e44-d5367f334957" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cc214-e01c-73cd-9e44-d5367f334957_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_019cc214-e01c-73cd-9e44-d5367f334957" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cc214-e01c-73cd-9e44-d5367f334957_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cc214-e01c-74fe-9319-f6748f2c1477" 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_019cc214-e01c-73cd-9e44-d5367f334957" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cc214-e01c-74fe-9319-f6748f2c1477" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cc214-e01c-75de-9c12-2cdb561c4226" 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_019cc214-e01c-74fe-9319-f6748f2c1477" xlink:to="loc_us-gaap_CostOfSalesMember_019cc214-e01c-75de-9c12-2cdb561c4226" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cc214-e01c-7d20-9da5-e2cf13db5fe1" 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_019cc214-e01c-74fe-9319-f6748f2c1477" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019cc214-e01c-7d20-9da5-e2cf13db5fe1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019cc214-f808-7ec6-b9de-9fb3ad633d2c" 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_019ba331-b80a-789e-b973-c48ce6fbba3c" xlink:to="loc_us-gaap_PlanNameAxis_019cc214-f808-7ec6-b9de-9fb3ad633d2c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cc214-f808-7ec6-b9de-9fb3ad633d2c_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_019cc214-f808-7ec6-b9de-9fb3ad633d2c" xlink:to="loc_us-gaap_PlanNameDomain_019cc214-f808-7ec6-b9de-9fb3ad633d2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019cc214-f808-71cf-9118-f57720ec2e40" 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_019cc214-f808-7ec6-b9de-9fb3ad633d2c" xlink:to="loc_us-gaap_PlanNameDomain_019cc214-f808-71cf-9118-f57720ec2e40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_A2025EquityIncentivePlanMember_019cc214-f808-7a3f-8dd5-fb4b4b8de4a5" xlink:href="andg-20251231.xsd#andg_A2025EquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019cc214-f808-71cf-9118-f57720ec2e40" xlink:to="loc_andg_A2025EquityIncentivePlanMember_019cc214-f808-7a3f-8dd5-fb4b4b8de4a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cc215-5f69-7e5e-b8da-8cc182c59822" 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_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019ba331-b80a-789e-b973-c48ce6fbba3c" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cc215-5f69-7e5e-b8da-8cc182c59822" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cc215-5f69-7e5e-b8da-8cc182c59822_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_019cc215-5f69-7e5e-b8da-8cc182c59822" xlink:to="loc_us-gaap_ClassOfStockDomain_019cc215-5f69-7e5e-b8da-8cc182c59822_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cc215-5f69-78a8-8301-7a9b45c01ddb" 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_019cc215-5f69-7e5e-b8da-8cc182c59822" xlink:to="loc_us-gaap_ClassOfStockDomain_019cc215-5f69-78a8-8301-7a9b45c01ddb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019cc215-5f69-7907-84ef-7f826827cd11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cc215-5f69-78a8-8301-7a9b45c01ddb" xlink:to="loc_us-gaap_CommonClassAMember_019cc215-5f69-7907-84ef-7f826827cd11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cc214-e01c-7497-be81-3e0d58b22e11" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cc214-e01c-7497-be81-3e0d58b22e11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cc214-e01c-754a-a497-87cf0a6b150d" 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_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cc214-e01c-754a-a497-87cf0a6b150d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cc214-e01c-7c83-9bd6-b35ff13a980a" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cc214-e01c-7c83-9bd6-b35ff13a980a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019cc214-f808-7152-9887-1e7cf80e8792" 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_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019cc214-f808-7152-9887-1e7cf80e8792" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum_019cf9f8-ca20-787b-beee-e7c80fa9aded" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum_019cf9f8-ca20-787b-beee-e7c80fa9aded" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesAnnualIncreaseBoardOfDirectorsDecisionNumberOfShares_019cf9f8-ca20-7da3-bd8e-10f4c61ee1e0" xlink:href="andg-20251231.xsd#andg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesAnnualIncreaseBoardOfDirectorsDecisionNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_andg_ShareBasedCompensationArrangementByShareBasedPaymentAwardAuthorizedSharesAnnualIncreaseBoardOfDirectorsDecisionNumberOfShares_019cf9f8-ca20-7da3-bd8e-10f4c61ee1e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019cc215-13b8-77e2-a447-3dbe690532de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019cc215-13b8-77e2-a447-3dbe690532de" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019cc215-3190-710d-b992-8e16b0aac524" 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_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_019cc215-3190-710d-b992-8e16b0aac524" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019cc215-3190-7c63-b034-47fbc39587a6" 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_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019cc215-3190-7c63-b034-47fbc39587a6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019d067f-af44-7fc2-ab0b-bf16c0e51277" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019d067f-af44-7fc2-ab0b-bf16c0e51277" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIssuanceOfThreshold_019cc215-5f69-78f4-a9f0-bb58553d642b" xlink:href="andg-20251231.xsd#andg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIssuanceOfThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_andg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIssuanceOfThreshold_019cc215-5f69-78f4-a9f0-bb58553d642b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019d068a-adfc-724f-8d9a-e00cbedc485f" xlink:href="andg-20251231.xsd#andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cc214-e01c-7262-8f3f-3d40aaf6c6d9" xlink:to="loc_andg_ShareBasedPaymentArrangementExpenseFromEquityRestructuring_019d068a-adfc-724f-8d9a-e00cbedc485f" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/EquitybasedCompensationScheduleofOutstandingUnitsDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#EquitybasedCompensationScheduleofOutstandingUnitsDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/EquitybasedCompensationScheduleofOutstandingUnitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c709b-80d6-75a4-a335-7342ec3d3458" 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_019c709b-80d6-7a9b-8f2d-5038b6f0f4e0" 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_019c709b-80d6-75a4-a335-7342ec3d3458" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c709b-80d6-7a9b-8f2d-5038b6f0f4e0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c709b-80d6-7912-aec4-9d017902c83f" 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_019c709b-80d6-7a9b-8f2d-5038b6f0f4e0" xlink:to="loc_us-gaap_PlanNameAxis_019c709b-80d6-7912-aec4-9d017902c83f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c709b-80d6-7912-aec4-9d017902c83f_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_019c709b-80d6-7912-aec4-9d017902c83f" xlink:to="loc_us-gaap_PlanNameDomain_019c709b-80d6-7912-aec4-9d017902c83f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c709b-80d6-7099-a12e-9e7ba6377628" 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_019c709b-80d6-7912-aec4-9d017902c83f" xlink:to="loc_us-gaap_PlanNameDomain_019c709b-80d6-7099-a12e-9e7ba6377628" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_A2025EquityIncentivePlanMember_019c709b-80d6-72df-906e-74b766963fc7" xlink:href="andg-20251231.xsd#andg_A2025EquityIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c709b-80d6-7099-a12e-9e7ba6377628" xlink:to="loc_andg_A2025EquityIncentivePlanMember_019c709b-80d6-72df-906e-74b766963fc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c709b-ae73-7171-9ac1-27b443758e05" 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_019c709b-80d6-7a9b-8f2d-5038b6f0f4e0" xlink:to="loc_us-gaap_AwardTypeAxis_019c709b-ae73-7171-9ac1-27b443758e05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c709b-ae73-7171-9ac1-27b443758e05_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_019c709b-ae73-7171-9ac1-27b443758e05" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c709b-ae73-7171-9ac1-27b443758e05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c709b-ae73-7f37-ab82-cf58aad59afc" 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_019c709b-ae73-7171-9ac1-27b443758e05" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c709b-ae73-7f37-ab82-cf58aad59afc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019d0674-4289-757a-86ac-fb81e4dffe6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c709b-ae73-7f37-ab82-cf58aad59afc" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019d0674-4289-757a-86ac-fb81e4dffe6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCLTIPUnitsMember_019c709b-ae73-741f-88ae-dfd71d477b1a" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCLTIPUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c709b-ae73-7f37-ab82-cf58aad59afc" xlink:to="loc_andg_ATUmbrellaLLCLTIPUnitsMember_019c709b-ae73-741f-88ae-dfd71d477b1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019d0673-67db-75c1-be48-4a4f0a83f8be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c709b-80d6-75a4-a335-7342ec3d3458" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019d0673-67db-75c1-be48-4a4f0a83f8be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_019d0676-321d-7ea0-b2c2-032be1c4d090" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019d0673-67db-75c1-be48-4a4f0a83f8be" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_019d0676-321d-7ea0-b2c2-032be1c4d090" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_019d0676-c8fe-7eed-8fec-79827a37e5ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019d0673-67db-75c1-be48-4a4f0a83f8be" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted_019d0676-c8fe-7eed-8fec-79827a37e5ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_019d0678-1aa8-7a9b-95bb-56ec05889241" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019d0673-67db-75c1-be48-4a4f0a83f8be" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_019d0678-1aa8-7a9b-95bb-56ec05889241" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_019d0677-660b-7cb5-8398-0aac155905e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019d0673-67db-75c1-be48-4a4f0a83f8be" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures_019d0677-660b-7cb5-8398-0aac155905e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_019d067a-9bc9-7b26-8a95-c6dc2df19590" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/EquitybasedCompensationScheduleofUnvestedUnitsDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#EquitybasedCompensationScheduleofUnvestedUnitsDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/EquitybasedCompensationScheduleofUnvestedUnitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019d0686-de96-713b-9941-7c22667c744a" 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_019d0686-de96-70a8-8791-f5bbd83bc37f" 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_019d0686-de96-713b-9941-7c22667c744a" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019d0686-de96-70a8-8791-f5bbd83bc37f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019d0686-de96-7fd5-bea4-0ba06cc183a7" 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_019d0686-de96-70a8-8791-f5bbd83bc37f" xlink:to="loc_us-gaap_AwardTypeAxis_019d0686-de96-7fd5-bea4-0ba06cc183a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019d0686-de96-7fd5-bea4-0ba06cc183a7_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_019d0686-de96-7fd5-bea4-0ba06cc183a7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019d0686-de96-7fd5-bea4-0ba06cc183a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019d0686-de96-7720-a0ec-37c1e80f9ece" 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_019d0686-de96-7fd5-bea4-0ba06cc183a7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019d0686-de96-7720-a0ec-37c1e80f9ece" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ClassXAggregatorUnitsMember_019d0687-e15a-79ff-8611-cef022b1e75a" xlink:href="andg-20251231.xsd#andg_ClassXAggregatorUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019d0686-de96-7720-a0ec-37c1e80f9ece" xlink:to="loc_andg_ClassXAggregatorUnitsMember_019d0687-e15a-79ff-8611-cef022b1e75a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019d1116-0e14-719d-8111-4f5a91ea3184" 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_019d0686-de96-713b-9941-7c22667c744a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019d1116-0e14-719d-8111-4f5a91ea3184" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019d0687-e15a-7ab6-a26c-062da8e43f26" 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_019d1116-0e14-719d-8111-4f5a91ea3184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019d0687-e15a-7ab6-a26c-062da8e43f26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019d0687-e15a-71d0-b759-00125269bafe" 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_019d1116-0e14-719d-8111-4f5a91ea3184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019d0687-e15a-71d0-b759-00125269bafe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019d0687-e15a-79f9-913d-26a4a962cab9" 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_019d1116-0e14-719d-8111-4f5a91ea3184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019d0687-e15a-79f9-913d-26a4a962cab9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019d0687-e15a-7e75-ac6e-2d6a69b57873" 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_019d1116-0e14-719d-8111-4f5a91ea3184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019d0687-e15a-7e75-ac6e-2d6a69b57873" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019d0688-16e4-7cd9-b098-1ceb9826d2f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/EquityBasedCompensationScheduleofEquitybasedCompensationExpenseDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#EquityBasedCompensationScheduleofEquitybasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/EquityBasedCompensationScheduleofEquitybasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c709d-d93c-7ef5-98de-f16375665caa" 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_019c709d-d93c-702d-b561-c817855ecd89" 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_019c709d-d93c-7ef5-98de-f16375665caa" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c709d-d93c-702d-b561-c817855ecd89" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019c709d-d93c-7b12-a807-e28877ea30e9" 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_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c709d-d93c-702d-b561-c817855ecd89" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019c709d-d93c-7b12-a807-e28877ea30e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c709d-d93c-7b12-a807-e28877ea30e9_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_019c709d-d93c-7b12-a807-e28877ea30e9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c709d-d93c-7b12-a807-e28877ea30e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c709d-d93c-7437-bc67-d1947c3daeb7" 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_019c709d-d93c-7b12-a807-e28877ea30e9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c709d-d93c-7437-bc67-d1947c3daeb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019c709d-d93c-7e8d-855d-4e6144fdc3d5" 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_019c709d-d93c-7437-bc67-d1947c3daeb7" xlink:to="loc_us-gaap_CostOfSalesMember_019c709d-d93c-7e8d-855d-4e6144fdc3d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019c709d-d93c-7c04-963d-1144551ee233" 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_019c709d-d93c-7437-bc67-d1947c3daeb7" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019c709d-d93c-7c04-963d-1144551ee233" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringChargesMember_019c709d-d93c-7025-a097-25c2d3d30277" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c709d-d93c-7437-bc67-d1947c3daeb7" xlink:to="loc_us-gaap_RestructuringChargesMember_019c709d-d93c-7025-a097-25c2d3d30277" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c709d-d93c-78cd-9161-0c7319c70a1f" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c709d-d93c-7ef5-98de-f16375665caa" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c709d-d93c-78cd-9161-0c7319c70a1f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/LossPerShareScheduleofPotentiallyDilutiveImpactDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#LossPerShareScheduleofPotentiallyDilutiveImpactDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/LossPerShareScheduleofPotentiallyDilutiveImpactDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c7155-2250-7135-afc1-66825669076b" 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_019c7155-2250-71e7-aa9f-216b72678de0" 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_019c7155-2250-7135-afc1-66825669076b" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c7155-2250-71e7-aa9f-216b72678de0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c7155-2250-7d4f-875b-5b0b5bcc007e" 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_019c7155-2250-71e7-aa9f-216b72678de0" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c7155-2250-7d4f-875b-5b0b5bcc007e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c7155-2250-7d4f-875b-5b0b5bcc007e_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_019c7155-2250-7d4f-875b-5b0b5bcc007e" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c7155-2250-7d4f-875b-5b0b5bcc007e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c7155-2250-764e-bd44-250877447483" 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_019c7155-2250-7d4f-875b-5b0b5bcc007e" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c7155-2250-764e-bd44-250877447483" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c7155-6a98-713d-b161-83204f77c5ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c7155-2250-764e-bd44-250877447483" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c7155-6a98-713d-b161-83204f77c5ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ATUmbrellaLLCLTIPUnitsMember_019c7156-17a9-7f8e-a578-99dd01f05d41" xlink:href="andg-20251231.xsd#andg_ATUmbrellaLLCLTIPUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c7155-2250-764e-bd44-250877447483" xlink:to="loc_andg_ATUmbrellaLLCLTIPUnitsMember_019c7156-17a9-7f8e-a578-99dd01f05d41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019c7155-2250-723c-b33d-cb0112cb027c" 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_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c7155-2250-7135-afc1-66825669076b" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019c7155-2250-723c-b33d-cb0112cb027c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/TransactionswithRelatedPartiesScheduleofRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#TransactionswithRelatedPartiesScheduleofRelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/TransactionswithRelatedPartiesScheduleofRelatedPartyTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019ba331-b80a-72b1-a525-939603861f1c" 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_019ba331-b80a-70ca-8c72-fbade13eb20c" 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_019ba331-b80a-72b1-a525-939603861f1c" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ba331-b80a-70ca-8c72-fbade13eb20c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cfc54-6b85-7998-910b-2d2fe77891c3" 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_019ba331-b80a-70ca-8c72-fbade13eb20c" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cfc54-6b85-7998-910b-2d2fe77891c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cfc54-6b85-7998-910b-2d2fe77891c3_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_019cfc54-6b85-7998-910b-2d2fe77891c3" xlink:to="loc_us-gaap_RelatedPartyDomain_019cfc54-6b85-7998-910b-2d2fe77891c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cfc54-6b85-7b3b-815e-ffafaf84d5c1" 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_019cfc54-6b85-7998-910b-2d2fe77891c3" xlink:to="loc_us-gaap_RelatedPartyDomain_019cfc54-6b85-7b3b-815e-ffafaf84d5c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019cfc54-6b85-7437-a90f-b6010abf7905" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cfc54-6b85-7b3b-815e-ffafaf84d5c1" xlink:to="loc_us-gaap_RelatedPartyMember_019cfc54-6b85-7437-a90f-b6010abf7905" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019cfc54-6b85-7f63-96cf-1f92f42c2982" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ba331-b80a-70ca-8c72-fbade13eb20c" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019cfc54-6b85-7f63-96cf-1f92f42c2982" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-7f63-96cf-1f92f42c2982_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019cfc54-6b85-7f63-96cf-1f92f42c2982" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-7f63-96cf-1f92f42c2982_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-71e7-864c-c44dbf9b9453" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019cfc54-6b85-7f63-96cf-1f92f42c2982" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-71e7-864c-c44dbf9b9453" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_MemberFirmLoansMember_019cfc54-6b85-7562-8903-a03eb8766f97" xlink:href="andg-20251231.xsd#andg_MemberFirmLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-71e7-864c-c44dbf9b9453" xlink:to="loc_andg_MemberFirmLoansMember_019cfc54-6b85-7562-8903-a03eb8766f97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_EmployeeLoanProgramMember_019cfc54-6b85-74b1-9d37-ea06e65f84d8" xlink:href="andg-20251231.xsd#andg_EmployeeLoanProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-71e7-864c-c44dbf9b9453" xlink:to="loc_andg_EmployeeLoanProgramMember_019cfc54-6b85-74b1-9d37-ea06e65f84d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_StewardshipFundsMember_019cfc54-6b85-7163-b83f-828634303f2e" xlink:href="andg-20251231.xsd#andg_StewardshipFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019cfc54-6b85-71e7-864c-c44dbf9b9453" xlink:to="loc_andg_StewardshipFundsMember_019cfc54-6b85-7163-b83f-828634303f2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019bea98-b861-7fe3-9457-5345ffeb9269" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ba331-b80a-72b1-a525-939603861f1c" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019bea98-b861-7fe3-9457-5345ffeb9269" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_019bea99-6902-7775-bb15-ffbf2cd966ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019bea98-b861-7fe3-9457-5345ffeb9269" xlink:to="loc_us-gaap_NotesReceivableGross_019bea99-6902-7775-bb15-ffbf2cd966ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_019ba331-b80a-7d0e-9588-f1efa6e520c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019bea98-b861-7fe3-9457-5345ffeb9269" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_019ba331-b80a-7d0e-9588-f1efa6e520c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_019ba331-b80a-7827-8d9b-220c5a1f7057" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019bea98-b861-7fe3-9457-5345ffeb9269" xlink:to="loc_us-gaap_NotesReceivableNet_019ba331-b80a-7827-8d9b-220c5a1f7057" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/TransactionswithRelatedPartiesScheduleofChangesintheAllowanceforCreditLossesDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#TransactionswithRelatedPartiesScheduleofChangesintheAllowanceforCreditLossesDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/TransactionswithRelatedPartiesScheduleofChangesintheAllowanceforCreditLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019ba331-b80a-793b-80a1-88cb00f39b7f" 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_019ba331-b80a-7bf5-b9c4-4360f70aa406" 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_019ba331-b80a-793b-80a1-88cb00f39b7f" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ba331-b80a-7bf5-b9c4-4360f70aa406" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019ba331-b80a-7806-b510-bbab3343ebf5" 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_019ba331-b80a-7bf5-b9c4-4360f70aa406" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019ba331-b80a-7806-b510-bbab3343ebf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7806-b510-bbab3343ebf5_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_019ba331-b80a-7806-b510-bbab3343ebf5" xlink:to="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7806-b510-bbab3343ebf5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7077-9661-9841932219ad" 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_019ba331-b80a-7806-b510-bbab3343ebf5" xlink:to="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7077-9661-9841932219ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019ba331-b80a-7bb5-b6c3-f1fce81e03d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019ba331-b80a-7077-9661-9841932219ad" xlink:to="loc_us-gaap_RelatedPartyMember_019ba331-b80a-7bb5-b6c3-f1fce81e03d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019ba331-b80a-76f6-988a-8a8165b0bb71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ba331-b80a-793b-80a1-88cb00f39b7f" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019ba331-b80a-76f6-988a-8a8165b0bb71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_019ba331-b80a-71a4-8580-c2e450f71d45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019ba331-b80a-76f6-988a-8a8165b0bb71" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_019ba331-b80a-71a4-8580-c2e450f71d45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_019ba331-b80a-7763-8cfd-7674d3e0a7f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019ba331-b80a-76f6-988a-8a8165b0bb71" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_019ba331-b80a-7763-8cfd-7674d3e0a7f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_019c706d-a3b4-7583-b806-9846bb58528f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019ba331-b80a-76f6-988a-8a8165b0bb71" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_019c706d-a3b4-7583-b806-9846bb58528f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_019ba331-b80a-7e6f-abfb-125a88c04e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/TransactionswithRelatedPartiesAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#TransactionswithRelatedPartiesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/TransactionswithRelatedPartiesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" 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_019ba331-b80a-7bef-8d51-7e15359ab37c" 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_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ba331-b80a-7bef-8d51-7e15359ab37c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c7074-d644-725a-9aff-9ffc6af56b3c" 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_019ba331-b80a-7bef-8d51-7e15359ab37c" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c7074-d644-725a-9aff-9ffc6af56b3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c7074-d644-725a-9aff-9ffc6af56b3c_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_019c7074-d644-725a-9aff-9ffc6af56b3c" xlink:to="loc_us-gaap_RelatedPartyDomain_019c7074-d644-725a-9aff-9ffc6af56b3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c7074-d644-7672-8dfb-9eab7d232edd" 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_019c7074-d644-725a-9aff-9ffc6af56b3c" xlink:to="loc_us-gaap_RelatedPartyDomain_019c7074-d644-7672-8dfb-9eab7d232edd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019c7074-d644-7a5e-967d-a12e9c113964" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c7074-d644-7672-8dfb-9eab7d232edd" xlink:to="loc_us-gaap_RelatedPartyMember_019c7074-d644-7a5e-967d-a12e9c113964" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019c7074-d644-78f6-b5fc-b230a089b7c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ba331-b80a-7bef-8d51-7e15359ab37c" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019c7074-d644-78f6-b5fc-b230a089b7c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-78f6-b5fc-b230a089b7c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019c7074-d644-78f6-b5fc-b230a089b7c3" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-78f6-b5fc-b230a089b7c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019c7074-d644-78f6-b5fc-b230a089b7c3" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_MemberFirmLoansMember_019c7074-d644-7c5f-af96-f82258bb0d5c" xlink:href="andg-20251231.xsd#andg_MemberFirmLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_MemberFirmLoansMember_019c7074-d644-7c5f-af96-f82258bb0d5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_EmployeeLoanProgramMember_019c7074-d644-7e12-8adb-fc616440440e" xlink:href="andg-20251231.xsd#andg_EmployeeLoanProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_EmployeeLoanProgramMember_019c7074-d644-7e12-8adb-fc616440440e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_StewardshipFundsMaturingOnDecember312029Member_019c7074-d644-7ba2-a912-58b33ed4d4ef" xlink:href="andg-20251231.xsd#andg_StewardshipFundsMaturingOnDecember312029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_StewardshipFundsMaturingOnDecember312029Member_019c7074-d644-7ba2-a912-58b33ed4d4ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_StewardshipFundsMaturingOnDecember312033Member_019c7074-d644-7d3f-8243-74b64e1ec19c" xlink:href="andg-20251231.xsd#andg_StewardshipFundsMaturingOnDecember312033Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_StewardshipFundsMaturingOnDecember312033Member_019c7074-d644-7d3f-8243-74b64e1ec19c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_TrademarkAndLicenseFeesMember_019c7074-fbc7-746d-b028-ba4b079ba4f7" xlink:href="andg-20251231.xsd#andg_TrademarkAndLicenseFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_TrademarkAndLicenseFeesMember_019c7074-fbc7-746d-b028-ba4b079ba4f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AndersenGlobalCommitmentsMember_019c7075-1c1b-756b-a4fc-4a4854e7de7d" xlink:href="andg-20251231.xsd#andg_AndersenGlobalCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_AndersenGlobalCommitmentsMember_019c7075-1c1b-756b-a4fc-4a4854e7de7d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_StateTaxPaymentsMember_019c7075-1c1b-720c-bd40-946db9ab6ea2" xlink:href="andg-20251231.xsd#andg_StateTaxPaymentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c7074-d644-734f-a877-e00009156461" xlink:to="loc_andg_StateTaxPaymentsMember_019c7075-1c1b-720c-bd40-946db9ab6ea2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeFinancingReceivableBeforeAllowanceForCreditLoss_019c7074-d644-705d-b6d6-24479c163a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeFinancingReceivableBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_InterestIncomeFinancingReceivableBeforeAllowanceForCreditLoss_019c7074-d644-705d-b6d6-24479c163a3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_019c7074-d644-7ed3-8f88-f82e0a953d68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_NotesReceivableGross_019c7074-d644-7ed3-8f88-f82e0a953d68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_019c7074-d644-7c03-9e0d-ca8896c927b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_NotesReceivableNet_019c7074-d644-7c03-9e0d-ca8896c927b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_FinancingReceivableMaturityPeriod_019c7074-d644-7032-92a0-3ec479cab4fb" xlink:href="andg-20251231.xsd#andg_FinancingReceivableMaturityPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_andg_FinancingReceivableMaturityPeriod_019c7074-d644-7032-92a0-3ec479cab4fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_FinancingReceivableTerm_019c7074-d644-7740-9507-ce13846f5e3d" xlink:href="andg-20251231.xsd#andg_FinancingReceivableTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_andg_FinancingReceivableTerm_019c7074-d644-7740-9507-ce13846f5e3d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019c7074-fbc7-7e45-b3aa-cd28d3bb4ad1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019c7074-fbc7-7e45-b3aa-cd28d3bb4ad1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_019c7074-fbc7-754d-982f-5f1727c16ccb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_019c7074-fbc7-754d-982f-5f1727c16ccb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019c7074-fbc7-7b9c-ad94-dcb1040e5ce8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019c7074-fbc7-7b9c-ad94-dcb1040e5ce8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019c7075-1c1b-7561-89da-0a434c9604e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c7074-d644-7ea4-8401-8baf05c985b6" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019c7075-1c1b-7561-89da-0a434c9604e5" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/CommitmentsandContingenciesAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#CommitmentsandContingenciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/CommitmentsandContingenciesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019ba331-b80a-70d5-ab5d-4f525183f48d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019ba331-b80a-7fb0-a536-49f8ccb17007" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019ba331-b80a-70d5-ab5d-4f525183f48d" xlink:to="loc_us-gaap_LossContingenciesTable_019ba331-b80a-7fb0-a536-49f8ccb17007" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019ba331-b80a-7920-94f5-be38d71c82c2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019ba331-b80a-7fb0-a536-49f8ccb17007" xlink:to="loc_srt_LitigationCaseAxis_019ba331-b80a-7920-94f5-be38d71c82c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019ba331-b80a-7920-94f5-be38d71c82c2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019ba331-b80a-7920-94f5-be38d71c82c2" xlink:to="loc_srt_LitigationCaseTypeDomain_019ba331-b80a-7920-94f5-be38d71c82c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019ba331-b80a-7396-b6d6-dcceecf3c4cc" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019ba331-b80a-7920-94f5-be38d71c82c2" xlink:to="loc_srt_LitigationCaseTypeDomain_019ba331-b80a-7396-b6d6-dcceecf3c4cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_EmployeeLegalMattersMember_019ba331-b80a-7093-b81d-43d09c2382aa" xlink:href="andg-20251231.xsd#andg_EmployeeLegalMattersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019ba331-b80a-7396-b6d6-dcceecf3c4cc" xlink:to="loc_andg_EmployeeLegalMattersMember_019ba331-b80a-7093-b81d-43d09c2382aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAxis_019ba331-b80a-7449-b841-cd293f6200c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019ba331-b80a-7fb0-a536-49f8ccb17007" xlink:to="loc_us-gaap_OtherCommitmentsAxis_019ba331-b80a-7449-b841-cd293f6200c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019ba331-b80a-7449-b841-cd293f6200c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019ba331-b80a-7449-b841-cd293f6200c7" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019ba331-b80a-7449-b841-cd293f6200c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019ba331-b80a-7a3c-9841-c23b24c23b96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019ba331-b80a-7449-b841-cd293f6200c7" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019ba331-b80a-7a3c-9841-c23b24c23b96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_TrainingCenterAgreementMember_019ba331-b80a-79d9-a055-778b81664a19" xlink:href="andg-20251231.xsd#andg_TrainingCenterAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_019ba331-b80a-7a3c-9841-c23b24c23b96" xlink:to="loc_andg_TrainingCenterAgreementMember_019ba331-b80a-79d9-a055-778b81664a19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_019ba331-b80a-73a5-8ed8-80390e1f4f55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyAccrualCarryingValueCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019ba331-b80a-70d5-ab5d-4f525183f48d" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_019ba331-b80a-73a5-8ed8-80390e1f4f55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019ba331-b80a-73f3-bc6d-d67f2194b142" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019ba331-b80a-70d5-ab5d-4f525183f48d" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019ba331-b80a-73f3-bc6d-d67f2194b142" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_019ba331-b80a-72cd-b16d-53a1e2c0f850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019ba331-b80a-70d5-ab5d-4f525183f48d" xlink:to="loc_us-gaap_OtherCommitment_019ba331-b80a-72cd-b16d-53a1e2c0f850" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019c7034-aced-773c-b99f-3bcbe4aedfa4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019ba331-b80a-70d5-ab5d-4f525183f48d" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019c7034-aced-773c-b99f-3bcbe4aedfa4" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/IncomeTaxesAdditionalInformationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#IncomeTaxesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/IncomeTaxesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_019cd2fa-ceb6-70e5-8ed3-d65141b0c802" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceTable_019cd2fa-ceb6-7478-8701-3aab25d37ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_019cd2fa-ceb6-70e5-8ed3-d65141b0c802" xlink:to="loc_us-gaap_ValuationAllowanceTable_019cd2fa-ceb6-7478-8701-3aab25d37ae9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019cd2fa-ceb6-70cf-aad5-9f23832333a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_019cd2fa-ceb6-7478-8701-3aab25d37ae9" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019cd2fa-ceb6-70cf-aad5-9f23832333a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019cd2fa-ceb6-70cf-aad5-9f23832333a3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019cd2fa-ceb6-70cf-aad5-9f23832333a3" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019cd2fa-ceb6-70cf-aad5-9f23832333a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019cd2fa-ceb6-714b-8cc8-7f7de23d10ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019cd2fa-ceb6-70cf-aad5-9f23832333a3" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019cd2fa-ceb6-714b-8cc8-7f7de23d10ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_019cd2fa-ceb6-7be8-a091-e734358a3624" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019cd2fa-ceb6-714b-8cc8-7f7de23d10ed" xlink:to="loc_us-gaap_DomesticCountryMember_019cd2fa-ceb6-7be8-a091-e734358a3624" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries_019cd2fa-ceb6-7edc-aa97-90cb6c24f6c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_019cd2fa-ceb6-70e5-8ed3-d65141b0c802" xlink:to="loc_us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries_019cd2fa-ceb6-7edc-aa97-90cb6c24f6c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019cd2fa-ceb6-7321-ae54-acda53a41285" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_019cd2fa-ceb6-70e5-8ed3-d65141b0c802" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019cd2fa-ceb6-7321-ae54-acda53a41285" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_019cd2fa-ceb6-7f02-ba99-833dc32c38c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_019cd2fa-ceb6-70e5-8ed3-d65141b0c802" xlink:to="loc_us-gaap_OperatingLossCarryforwards_019cd2fa-ceb6-7f02-ba99-833dc32c38c6" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/SegmentReportingScheduleofReconciliationDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#SegmentReportingScheduleofReconciliationDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/SegmentReportingScheduleofReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" 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_019ba331-b80a-7c94-a45f-a31ca4f508ac" 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_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019ba331-b80a-7c94-a45f-a31ca4f508ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019ba331-b80a-7892-bf1c-0ad9c651ce79" 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_019ba331-b80a-7c94-a45f-a31ca4f508ac" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019ba331-b80a-7892-bf1c-0ad9c651ce79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019ba331-b80a-7892-bf1c-0ad9c651ce79_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_019ba331-b80a-7892-bf1c-0ad9c651ce79" xlink:to="loc_us-gaap_SegmentDomain_019ba331-b80a-7892-bf1c-0ad9c651ce79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019ba331-b80a-706a-9616-d09700644c82" 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_019ba331-b80a-7892-bf1c-0ad9c651ce79" xlink:to="loc_us-gaap_SegmentDomain_019ba331-b80a-706a-9616-d09700644c82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_ReportableSegmentMember_019ba331-b80a-7e45-905f-2a809bd09118" xlink:href="andg-20251231.xsd#andg_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019ba331-b80a-706a-9616-d09700644c82" xlink:to="loc_andg_ReportableSegmentMember_019ba331-b80a-7e45-905f-2a809bd09118" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b80a-7d52-bb6d-6b38c08a85b1" 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_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ba331-b80a-7d52-bb6d-6b38c08a85b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019ba331-b80a-7df1-809c-613ac106724d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019ba331-b80a-7df1-809c-613ac106724d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019ba331-b80a-7c7f-b096-5b12d430a4f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ba331-b80a-7df1-809c-613ac106724d" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019ba331-b80a-7c7f-b096-5b12d430a4f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_019ba331-b80a-70f4-8aa3-fd7324a4b9b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ba331-b80a-7df1-809c-613ac106724d" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_019ba331-b80a-70f4-8aa3-fd7324a4b9b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019ba331-b80a-7577-8fc9-592d0717d941" 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_OperatingExpensesAbstract_019ba331-b80a-7df1-809c-613ac106724d" xlink:to="loc_us-gaap_DepreciationAndAmortization_019ba331-b80a-7577-8fc9-592d0717d941" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019ba331-b80a-7a4c-b26e-5c4a649b8681" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019ba331-b80a-7df1-809c-613ac106724d" xlink:to="loc_us-gaap_OperatingExpenses_019ba331-b80a-7a4c-b26e-5c4a649b8681" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019ba331-b80a-7dc4-bc84-1e697b3781b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_OperatingIncomeLoss_019ba331-b80a-7dc4-bc84-1e697b3781b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019ba331-b80a-71bf-9720-d0984a282901" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019ba331-b80a-71bf-9720-d0984a282901" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019ba331-b80a-7b7d-a886-f142223e04cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019ba331-b80a-7b7d-a886-f142223e04cf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019ba331-b80a-7f42-92c6-b0559261062e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019ba331-b80a-7f42-92c6-b0559261062e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ba331-b80a-7772-adb1-c438318b92fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ba331-b80a-7772-adb1-c438318b92fa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ba331-b80a-7efb-a7aa-5ea4b7ffb4cc" 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_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019ba331-b80a-7efb-a7aa-5ea4b7ffb4cc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ba331-b80a-7546-9e25-411ecdf3cd3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019ba331-b80a-7540-af25-87a23a691f26" xlink:to="loc_us-gaap_NetIncomeLoss_019ba331-b80a-7546-9e25-411ecdf3cd3d" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://andersen.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="andg-20251231.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://andersen.com/role/SubsequentEventsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019cd306-3ef5-704c-a323-a988ab5ceafe" 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_019cd306-3ef5-7837-abe1-a7ff1f82dc14" 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_019cd306-3ef5-704c-a323-a988ab5ceafe" xlink:to="loc_us-gaap_SubsequentEventTable_019cd306-3ef5-7837-abe1-a7ff1f82dc14" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019cd306-c466-77aa-9d69-d7c4b27a22e8" 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_019cd306-3ef5-7837-abe1-a7ff1f82dc14" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019cd306-c466-77aa-9d69-d7c4b27a22e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019cd306-c466-77aa-9d69-d7c4b27a22e8_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_019cd306-c466-77aa-9d69-d7c4b27a22e8" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019cd306-c466-77aa-9d69-d7c4b27a22e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019cd306-c466-78c4-8da6-5bc24251bd64" 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_019cd306-c466-77aa-9d69-d7c4b27a22e8" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019cd306-c466-78c4-8da6-5bc24251bd64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019cd307-09f6-7b9b-81a6-a53bc580eca6" 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_019cd306-c466-78c4-8da6-5bc24251bd64" xlink:to="loc_us-gaap_SubsequentEventMember_019cd307-09f6-7b9b-81a6-a53bc580eca6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019d060f-955e-72d0-b003-e00fb98f9b91" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019cd306-3ef5-7837-abe1-a7ff1f82dc14" xlink:to="loc_srt_StatementScenarioAxis_019d060f-955e-72d0-b003-e00fb98f9b91" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019d060f-955e-72d0-b003-e00fb98f9b91_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019d060f-955e-72d0-b003-e00fb98f9b91" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019d060f-955e-72d0-b003-e00fb98f9b91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019d060f-955e-799e-8c79-96333b71b82e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019d060f-955e-72d0-b003-e00fb98f9b91" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019d060f-955e-799e-8c79-96333b71b82e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019d060f-bbbd-765b-9574-9c8960bef1c8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019d060f-955e-799e-8c79-96333b71b82e" xlink:to="loc_srt_ScenarioForecastMember_019d060f-bbbd-765b-9574-9c8960bef1c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019d2062-12db-7ef3-960a-04a64188a1b0" 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_SubsequentEventTable_019cd306-3ef5-7837-abe1-a7ff1f82dc14" xlink:to="loc_srt_StatementGeographicalAxis_019d2062-12db-7ef3-960a-04a64188a1b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019d2062-12db-7ef3-960a-04a64188a1b0_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_019d2062-12db-7ef3-960a-04a64188a1b0" xlink:to="loc_srt_SegmentGeographicalDomain_019d2062-12db-7ef3-960a-04a64188a1b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019d2062-12db-7028-9d79-b5860736cd8d" 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_019d2062-12db-7ef3-960a-04a64188a1b0" xlink:to="loc_srt_SegmentGeographicalDomain_019d2062-12db-7028-9d79-b5860736cd8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_andg_AfricaAndLatinAmericaMember_019d2062-8ef3-78fa-935e-2ae55993fdbc" xlink:href="andg-20251231.xsd#andg_AfricaAndLatinAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019d2062-12db-7028-9d79-b5860736cd8d" xlink:to="loc_andg_AfricaAndLatinAmericaMember_019d2062-8ef3-78fa-935e-2ae55993fdbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019d2062-cef9-7324-a808-4baf17ca60d7" 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_019d2062-12db-7028-9d79-b5860736cd8d" xlink:to="loc_country_CA_019d2062-cef9-7324-a808-4baf17ca60d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_019d060d-0c65-7e41-95db-294084dbce08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Dividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019cd306-3ef5-704c-a323-a988ab5ceafe" xlink:to="loc_us-gaap_Dividends_019d060d-0c65-7e41-95db-294084dbce08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfBusinessesAcquired_019d060d-bc4a-7e72-87f5-68c6ce8bb7c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfBusinessesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019cd306-3ef5-704c-a323-a988ab5ceafe" xlink:to="loc_us-gaap_NumberOfBusinessesAcquired_019d060d-bc4a-7e72-87f5-68c6ce8bb7c4" xlink:type="arc" order="1"/>
  </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_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_OperatingLeaseLiabilityCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent" xlink:type="arc" order="41"/>
    <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_OperatingLeaseRightOfUseAsset" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="arc" order="101"/>
  </link:definitionLink>
</link:linkbase>
