triumvir

noun

tri·​um·​vir trī-ˈəm-vər 

plural triumvirs also triumviri trī-ˈəm-və-ˌrī 

-ˌrē

: one of a commission or ruling body of three

Word History

Etymology

Middle English, from Latin, back-formation from triumviri, plural, commission of three men, from trium virum of three men

First Known Use

15th century, in the meaning defined above

Kids Definition

triumvir

noun

tri·​um·​vir trī-ˈəm-vər 

: one of a council or ruling body of three especially in ancient Rome