- the office or magistracy of a triumvir.
- a government of three officers or magistrates functioning jointly.
- a coalition of three magistrates or rulers for joint administration.
- any association of three in office or authority.
- any group or set of three.
- (in ancient Rome)
- a board of three officials jointly responsible for some task
- the political alliance of Caesar, Crassus, and Pompey, formed in 60 bc (First Triumvirate)
- the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc (Second Triumvirate)
- any joint rule by three men
- any group of three men associated in some way
- the office of a triumvir
