- 1[uncountable] dominion (over somebody/something) (literary) authority to rule; control Man has dominion over the natural world. Soon the whole country was under his sole dominion.
- 2[countable] (formal) an area controlled by one ruler the vast dominions of the Roman Empire
- 3Dominion [countable] (in the past) any of the countries of the British Commonwealth that had their own government compare colony, protectorate
Check pronunciation: dominion