/ Dictionary / Index D DT: Meaning and Definition of Find definitions for: DT Pronunciation: [key] — Slang. Slang. detective. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. D.S.W. d.t.d. Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language