significant other significantness • significate · · · Info · Definitions · Synonyms · Characters · · significant other · · Text Common · · Latin · · Scripts 17 · · Length 6 · · Syllables Definitions · · · (noun) a person (not necessarily a spouse) with whom you cohabit and share a long-term sexual relationship. Synonyms: domestic partner, significant other, spousal equivalent, spouse equivalent. · · Noun Definition 1 Synonyms · · · domestic partner · · Synonym 1 spousal equivalent · · Synonym 2 spouse equivalent · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074