/ Dictionary / Index D dupery: Meaning and Definition of Find definitions for: dup•er•y Pronunciation: (d'pu-rē, dy'-), [key] — pl. -er•ies an act, practice, or instance of duping. the state of one who is duped. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dupery (Thesaurus) dupe dupion Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language