/ Dictionary / Index D duopoly: Meaning and Definition of Find definitions for: du•op•o•ly Pronunciation: (d-op'u-lē, dy-), [key] — pl. -lies. the market condition that exists when there are only two sellers. Cf. monopoly (def. 1), Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. duomo duopsony Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language