/ Dictionary / Index D detonator: Meaning and Definition of Find definitions for: det•o•na•tor Pronunciation: (det'n-ā"tur), [key] — n. a device, as a percussion cap, used to make another substance explode. something that explodes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: detonator (Thesaurus) detonation detour Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language