Word forms: duopolies
1. variable noun If two companies or people have a duopoly on something such as an industry, they share complete control over it and it is impossible for others to become involved in it. [business] ⇒ They are no longer part of a duopoly on overseas routes. 2. countable noun A duopoly is a group of two companies which are the only ones which provide a particular product or service, and which therefore have complete control over an industry. [business] ⇒ Their smaller rival is battling to end their duopoly.
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