/ Dictionary / Index D det. in dup.: Meaning and Definition of Find definitions for: det. in dup. Pronunciation: [key] (in prescriptions) let twice as much be given. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. detick detinue 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