thirteen thirt • thirteener · · · Info · Definitions · Synonyms · Characters · · thirteen · · Text Latin · · Script 8 · · Length Definitions · · · (noun) the cardinal number that is the sum of twelve and one. Synonyms: 13, XIII, baker's dozen, long dozen. · · Noun Definition 1 (adj) being one more than twelve. Synonyms: 13, xiii. · · Adjective Definition 1 Synonyms · · · 13 · · Synonym 1 xiii · · Synonym 2 baker's dozen · · Synonym 3 long dozen · · Synonym 4 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074