A person who or thing which is pre-eminent in a specified class or sphere; the chief; the greatest or best. Usually with of, among. Cf. king, n. 4.

One who has supremacy or rank above, or authority over, others; a superior; a ruler, governor, lord, or master (of persons, etc.). Frequently…

A person supreme over others; a ruler. Obsolete.

A person having supreme authority, rank, or power; a supreme authority or ruler. Also in extended use. Formerly also: †a superior (obsolete). Now rare…

A supreme leader or ruler; a person holding the highest military or political authority.