What is the meaning of Dominium?

The ownership of a thing.

The highest category in the classification of organisms, ranking above regnum.

Political unit

feast, banquet

rule, dominion

ownership

domain, dominium

dominion (one of several self-governing nations of the British Empire)

dominium (large land or forest estate belonging to a king or powerful families in medieval Poland)

demesne, domain (lord's chief manor place)

dominium (full authority of the head of the house over slaves and things)

Source: wiktionary.org