Monopoly

Alternate use: Monopoly (game)
In economics, a monopoly (from the Greek monos, one + polein, to sell) is defined as a market situation where there is only one provider of a product or service. Monopolies are characterized by a lack of economic competition for the good or service that they provide (and a lack of viable substitute goods), as well as high barriers to entry for potential competitors on the market.
Monopoly should be distinguished from monopsony, in which there is only one buyer of the product or service; it should also, strictly, be distinguished from the (similar) phenomenon of a cartel. In a monopoly a single firm is the sole provider of a product or service; in a cartel a centralized institution is set up to partially coordinate the actions of several independent providers (which is a form of oligopoly).