coruler

/koʊˈruːlər/
noun
  1. A person who rules together with another person or group, sharing power and authority.
    • In ancient Rome, some emperors appointed a coruler to help manage the vast empire.
    • The two brothers became corulers of the kingdom after their father's death.
    • The queen and her husband served as corulers, making decisions together.
Antonyms
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