/ Dictionary / Index S shadfly: Meaning and Definition of Find definitions for: shad•fly Pronunciation: (shad'flī"), [key] — pl. -flies. mayfly (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: shadfly (Thesaurus) shade tree shading 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