/ Dictionary / Index G gadfly: Meaning and Definition of Find definitions for: gad•fly Pronunciation: (gad'flī"), [key] — pl. -flies. any of various flies, as a stable fly or warble fly, that bite or annoy domestic animals. a person who persistently annoys or provokes others with criticism, schemes, ideas, demands, requests, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gadfly (Thesaurus) G/A dep. gadget Related Content Daily Word Quiz: feral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language