/ Dictionary / Index F fruit fly: Meaning and Definition of Find definitions for: fruit' fly" Pronunciation: [key] any of numerous small dipterous insects of the family Tephritidae, the larvae of which feed on the fruit of various plants. See drosophila. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fruiterer fruitful Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language