D defs.my
Entry 1 sense Webster, 1913

Duumvirate

· Du·um·vi·rate · IPA /djuːˈʌmvɪɹət/
01 n. The union of two men in the same office; or the office, dignity, or government of two men thus associated, as in ancient Rome.
  1. 1.
    The union of two men in the same office; or the office, dignity, or government of two men thus associated, as in ancient Rome.