Breadcrumb Home > 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: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language