/ Dictionary / Index D Deet: Meaning and Definition of Find definitions for: Deet Pronunciation: (dēt), [key] — Chem., Trademark. Chem.,Trademark. a brand of diethyltoluamide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deesis de-excite Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language