Definition
diarchy
noun
- a form of government in which power is held by two rulers or authorities
Usage: also spelled dyarchy; formal, political term
Examples
- Ancient Sparta operated as a diarchy with two kings ruling simultaneously.
- The diarchy system allowed power to be balanced between two co-rulers.
- Some historians argue that the early Roman Republic functioned as a diarchy under the two consuls.
- A diarchy can prevent the concentration of power in a single leader's hands.