third party third-order • third person · · · Info · Definitions · Characters · · third party · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) someone other than the principals who are involved in a transaction. Synonyms: third party. · · Noun Definition 1 (noun) a political party organized in opposition to the major parties in a two-party system. Synonyms: third party. · · Noun Definition 2 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 h latin small letter h U+0068 i latin small letter i U+0069 p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079