Definition of quadrumvirate in English:
 quadrumvirate
noun kwɒˈdrʌmvɪrətkwäˈdrəmvərət
A group of four powerful or notable people.
 Example sentencesExamples
-  He has two quadrumvirates on which he depends: Robinson, Dickinson, Frost and Millay in poetry, and, less rhythmically, Faulkner, Hemingway, Cather and Lawrence among the prose writers.
 -  He was one of a quadrumvirate of Norwegians who developed much of the basis for modern econometrics.
 -  Cummings even had to ask the identity of the Irish member of the quadrumvirate, assuming at first it was Yeats.
 -  The quadrumvirate of men who provide blurbs for Kirby's fifth collection, read like a who's who of the book's poetic influences.
 -  Although power was divided among members in the quadrumvirate, the sharing was not even.
 
 Synonyms
quartet, foursome, tetralogy, quadruplets
Origin
  
Mid 18th century: from Latin quadru- 'four' + triumvirate.