D defs.my
Entry 2 senses Webster, 1913

Triumvirate

/trī-ŭm'-vẽr-ət/ · Tri·um·vi·rate · IPA /tɹaɪˈʌmvəɹət/
01 n. Government by three in coalition or association; the term of such a government.
  1. 1.
    Government by three in coalition or association; the term of such a government.
  2. 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.