1.NounAn economic condition in which two sellers exert most control over the market of a commodity.
"Modern examples of duopoly include the American markets for credit cards (Visa and MasterCard), smartphones (Apple and Google), soft drinks (Coca-Cola and Pepsi), and airplanes (Airbus and Boeing)."
2.NounThe domination of a field of endeavour by two entities or people.
"First past the post voting has long maintained American politics as an effective duopoly where power simply alternates between two main parties."
3.NounThe domination of a field of endeavour by two entities or people.
"First past the post voting has long maintained American politics as an effective duopoly where power simply alternates between two main parties."
4.NounA situation in which two or more radio or television stations in the same city or community share common ownership.