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Oligopoly: An oligopoly (from Ancient Greek ὀλίγος (olígos) 'few', and πωλέω (pōléō) 'to sell') is a market in which control over an industry lies in the hands of a few large sellers who own a dominant share of the market. Oligopolistic markets have homogenous products, few market participants, and inelastic demand for the products in those industries.[1] As a result of their significant market power, firms in oligopolistic markets can influence prices through manipulating the supply function. Firms in an oligopoly are also mutually interdependent, as any action by one firm is expected to affect other firms in the market and evoke a reaction or consequential action.[1] As a result, firms in oligopolistic markets often resort to collusion as means of maximising profits.

https://en.wikipedia.org/wiki/Oligopoly