thirtieth thirteenthly • thirty · · · Info · Definitions · Synonyms · Characters · · thirtieth · · Text Latin · · Script 9 · · Length Definitions · · · (noun) position 30 in a countable series of things. · · Noun Definition 1 (adj) coming next after the twenty-ninth in position. Synonyms: 30th. · · Adjective Definition 1 Synonyms · · · 30th · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 r latin small letter r U+0072 t latin small letter t U+0074