/ Dictionary / Index G gallfly: Meaning and Definition of Find definitions for: gall•fly Pronunciation: (gôl'flī"), [key] — pl. -flies. any of various insects that deposit their eggs in plants, causing the formation of galls. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gallfly (Thesaurus) galley-west gall gnat Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language