supremacy

noun

The quality or condition of being supreme.

Supreme power or authority.

The state of being supreme, or in the highest station of power; also, highest authority or power.

An English statute of 1558–9 (1 Eliz., c. 1) vesting spiritual authority in the crown, to the exclusion of all foreign jurisdiction.

Synonyms Predominance, etc. (sec priority), sovereignty, domination, mastery.