/ Dictionary / Index D dupion: Meaning and Definition of Find definitions for: du•pi•on Pronunciation: (d'pē-ōn"), [key] — n. a cocoon formed jointly by two silkworms. douppioni. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dupery duplation 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