Webster’s Revised Unabridged Dictionary · 1913
Triumvirate
Tri·um′vi·rate (·vĭ·rāt), n. [L. triumviratus: cf. F. triumvirat.] 1. Government by three in coalition or association; the term of such a government.
2. A coalition or association of three in office or authority; especially, the union of three men who obtained the government of the Roman empire.