/ Dictionary / Index F fifty-eight: Meaning and Definition of Find definitions for: fif•ty-eight Pronunciation: (fif'tē-āt'), [key] — n. a cardinal number, 50 plus 8. a symbol for this number, as 58 or LVIII. a set of this many persons or things. —adj. amounting to 58 in number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fifty-eight (Thesaurus) fifty fifty-eighth Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language