1. plural of triarchy; governments ruled by three people or groups sharing power
Usage: formal; political science

Examples

• The ancient world saw several triarchies where power was divided among three rulers.
• Political scientists studied the stability of triarchies compared to single-ruler systems.
• The treaty established temporary triarchies in the disputed territories.
• Historical triarchies often faced internal conflicts between the three governing parties.
• The constitution outlined procedures for forming triarchies during national emergencies.