/ Dictionary / Index D deer fly: Meaning and Definition of Find definitions for: deer' fly" Pronunciation: [key] any of several tabanid flies of the genus Chrysops, the female of which is a vector of tularemia in deer, livestock, and humans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Deerfield Beach deer fly fever Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language