›[C or U]ECONOMICSa situation in which one company or person or a government has no competition in the sale of a particular product or service and is able to control its supply and price: business/corporate/government monopoliesHe argues that farm subsidies help keep agricultural land away from corporate monopolies.a monopoly of sthEach firm has a monopoly of goods that tend to be used together.a monopoly in/on sthA decision by the Supreme Court struck down the state's monopoly on radio and television stations.
›[C]ECONOMICSa company, person, etc. that is the only one supplying a particular product or service: The Justice Department is suing the company because they claim that it used unfair tactics to become a monopoly.
›[C]something that is controlled by one person or group and not shared by others: The network is a monopoly of the state telephone company.