Of a person: greatest in respect of power, authority, importance, or consequence. Formerly frequently (chiefly Scottish) in most master n. a ruler…

Of persons: Having superior or supreme rank or power; spec. holding the position of a ruler or monarch.

figurative. Highest in rank, quality, etc. Obsolete.

Of a person: highest in authority or rank; holding the highest place in authority, government, or power. Formerly also with †to: superior to, having…

Of a person or group of people: very important or powerful; foremost, leading, greatest.

= sovereign, adj.

Of the highest rank; most senior.