triarchy

/ˈtraɪɑːrki/
noun
  1. A system of government or leadership by three people or groups.
    • The company's board formed a triarchy to make major decisions together.
    • Some political theorists argue that a triarchy can be more stable than a single ruler.
    • The ancient city was ruled by a triarchy of three elected officials.
  2. A group or region governed by three rulers.
    • Historians study the triarchy that emerged after the collapse of the empire.
    • The triarchy met annually to discuss trade and defense.
    • The triarchy controlled a large territory in the eastern part of the island.
Synonyms
What does "triarchy" mean? | whatsthatwordmean | whatsthatwordmean