duopoly

By analogy with monopoly, from the Latin-derived prefix duo- and the Greek-derived suffix -poly. From duo- +‎ -poly.

• IPA^(key): /djuːˈɒpəli/, /duːˈɒpəli/
• Rhymes: -ɒpəli

duopoly (countable and uncountable, plural duopolies)

1. (economics) A market situation in which two companies exclusively provide a particular product or service.
2. (by extension) The domination of a field of endeavor by two people or entities.
   • 2012 June 29, Kevin Mitchell, “Roger Federer back from Wimbledon 2012 brink to beat Julien Benneteau”, in The Guardian‎, archived from the original on 15 November 2016:

     In 2011, his spirit and body were shattered by Jo-Wilfried Tsonga in the semi-finals. Last night, the stakes were just as high – even though the tournament is not out of the first week – because there is a creeping perception that the [Roger] Federer–[Rafael] Nadal duopoly is slowly giving way under pressure from below.

   • 2018 February 10, “Spain’s centrist Ciudadanos are on the march”, in The Economist‎, →ISSN:

     In Spain, Socialist and PP governments have alternated since the 1980s. This cosy duopoly was weakened by the long recession that followed the bursting of Spain’s housing bubble in 2007.

3. (broadcasting, by extension) Situation in which two or more TV or radio-stations in the same city or community share common ownership.

• duopolist, duopolistic, duopolistically

• monopoly, oligopoly, duarchy

• duopoly on Wikipedia.Wikipedia
• duopoly (broadcasting) on Wikipedia.Wikipedia