1. a ruler or leader of one of seven divisions or regions; a member of a heptarchy
Usage: historical; formal
2. a state or region that is one of seven divisions under separate rulers
Usage: historical; formal

Examples

• The heptarch ruled his portion of the divided kingdom with considerable authority.
• Each heptarch maintained control over their own territory and subjects.
• The seven heptarchs met to discuss matters affecting the entire region.
• Anglo-Saxon England was once divided among several heptarchs.
• The heptarch's power was limited by agreements with the other rulers.