/ Dictionary / Index D dayfly: Meaning and Definition of Find definitions for: day•fly Pronunciation: (dā'flī"), [key] — pl. -flies. a mayfly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dayfly (Thesaurus) dayflower Day-Glo Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language