From Longman Dictionary of Contemporary Englishtriumviratetri‧um‧vir‧ate /traɪˈʌmvərət/ noun [countable] formalPGOGROUP OF PEOPLE a group of three very powerful people
Examples from the Corpus
triumvirate• Henry Perky was the last of a triumvirate of health addicts who helped change the breakfast habits of the continent.• It shifted back to the evil Sun / Lewthwaite / Kane triumvirate.• There could be an Otago triumvirate in charge of the All Black team this year.• The third member of the triumvirate, and, as it developed, the most important, was William Mackenzie.• She was in the shadow of the triumvirate last year.• He refused to recognize the triumvirate plan previously proposed by Santa Anna, saying that it was unconstitutional.• The unholy triumvirate of developer, planner and architect had maimed it for ever in the sixties and seventies.Origin triumvirate (1500-1600) Latin triumviratus, from triumviri “committee of three men”, from trium virum “of three men” 