/ Dictionary / Index F flyweight: Meaning and Definition of Find definitions for: fly•weight Pronunciation: (flī'wāt"), [key] — n. a boxer or other contestant of the lightest competitive class, esp. a professional boxer weighing up to 112 lb. (51 kg). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: flyweight (Thesaurus) flyway flywheel Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language