[doo-op-uh-lee, dyoo-]

noun, plural du·op·o·lies.

the market condition that exists when there are only two sellers.Compare monopoly(def 1), oligopoly.

Origin of duopoly

First recorded in 1915–20; duo- + (mono)poly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for duopoly


noun plural -lies

a situation in which control of a commodity or service in a particular market is vested in just two producers or suppliers
Derived Formsduopolistic (ˌdjʊɒpəˈlɪstɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012