/ Dictionary / Index F fifty-eighth: Meaning and Definition of Find definitions for: fif•ty-eighth Pronunciation: (fif'tē-ātth', -āth'), [key] — adj. next after the fifty-seventh; being the ordinal number for 58. being one of 58 equal parts. —n. a fifty-eighth part, esp. of one (). the fifty-eighth member of a series. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fifty-eight fifty-fifth Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language