paramount

Highest, supreme; also, chief, leading, pre-eminent.

[…]a Traitor Paramount;

Hitherto she had chiefly dwelt on her unkindness and neglect; but absence, like charity, covers a multitude of sins; and the thought now paramount was, that she should see her no more.

Of the highest importance.

Getting those credit cards paid off is paramount.

Of a law, right, etc.: having precedence over or superior to another.

A chief or superior; (specifically, chiefly South Africa) an African chief having the highest status in a region; a paramount chief.

A supreme ruler; an overlord; (specifically, historical) in the feudal system, a landowner who did not derive ownership of the land from anyone else, and who was able to grant fees to others; a lord paramount.

A city in Los Angeles County, California, United States.