/ Dictionary / Index F fifty-fifty: Meaning and Definition of Find definitions for: fifty-fif•ty Pronunciation: (fif'tē-fif'tē), [key] — adj. equally good and bad, likely and unlikely, favorable and unfavorable, etc.: a fifty-fifty chance of winning. —adv. in an evenly or equally divided way: The board voted fifty-fifty on the merger. to share equally in the cost, responsibility, or profits (of&hasp;): We went fifty-fifty on the dinner check. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fifty-fifty (Thesaurus) fifty-fifth fifty-first Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language