fifty fiftieth • fiftyfold · · · Info · Definitions · Synonyms · Characters · · fifty · · Text Latin · · Script 5 · · Length Definitions · · · (noun) the cardinal number that is the product of ten and five. Synonyms: 50, L. · · Noun Definition 1 (noun) a United States bill worth 50 dollars. Synonyms: fifty dollar bill. · · Noun Definition 2 (adj) being ten more than forty. Synonyms: 50, l. · · Adjective Definition 1 Synonyms · · · 50 · · Synonym 1 l · · Synonym 2 fifty dollar bill · · Synonym 3 Characters · · f latin small letter f U+0066 i latin small letter i U+0069 t latin small letter t U+0074 y latin small letter y U+0079