DUOPOLY Meaning of DUOPOLY in English [ djʊ'ɒpəli ]■ noun ( plural duopolies ) a situation in which two suppliers dominate a market.Derivativesduopolistic adjective Origin1920s: from duo- , on the pattern of monopoly . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004