dominion

Short definition from Wiktionary

Noun

1. 1
   Power or the use of power; sovereignty over something; stewardship, supremacy.
2. 2
   Predominance; ascendancy.
3. 3
   A kingdom, nation, or other sphere of influence; governed territory.
4. 4
   kingdom
5. 5
   An order of angel in Christian angelology, ranked above virtues and below thrones.

Proper noun

1. 1
   Any of the self-governing nations of the British Commonwealth until 1949.