juːnˈaɪɾᵻd mˌæsɪdˈoʊniə, ˈoʊbɪdˌaɪntə mˈeɪkdənˌɪdʒə, ɔːɹ ɡɹˈeɪɾɚ mˌæsɪdˈoʊniə, ɡˈoʊlmə mˈeɪkdənˌɪdʒə, ɪz ɐn ɪɹˌiːdˈɛntɪst kˈɑːnsɛpt ɐmˌʌŋ mˌæsɪdˈoʊniən nˈæʃənəlˌɪsts ðæt ˈeɪmz tə jˈuːnɪfˌaɪ ðə tɹænsnˈæʃənəl ɹˈiːdʒən ʌv mˌæsɪdˈoʊniə ɪn sˈaʊθiːstɚn jˈʊɹɹəp wˌɪtʃ ðeɪ klˈeɪm æz ðɛɹ hˈoʊmlənd ænd wˌɪtʃ ðeɪ ɐsˈɜːt wʌz ʌndʒˈʌstli dᵻvˈaɪdᵻd ˌʌndɚ ðə tɹˈiːɾi ʌv bˌuːkɚɹˈɛst ɪn nˈaɪntiːnhˈʌndɹɪd θˈɜːtiːn ˌɪntʊ ɐ sˈɪŋɡəl stˈeɪt ðæt wʊd biː dˈɑːmᵻnˌeɪɾᵻd baɪ ˈɛθnɪk mˌæsɪdˈoʊniənz.
United Macedonia (, Obedineta Makedonija), or Greater Macedonia (, Golema Makedonija), is an irredentist concept among Macedonian nationalists that aims to unify the transnational region of Macedonia in Southeastern Europe (which they claim as their homeland and which they assert was unjustly divided under the Treaty of Bucharest in 1913) into a single state that would be dominated by ethnic Macedonians.