/ Dictionary / Index F fiver: Meaning and Definition of Find definitions for: fiv•er Pronunciation: (fī'vur), [key] — n. Slang. a five-dollar bill. a five-pound note. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fiver (Thesaurus) fivepenny fives Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language