a nonreigning male member of a royal family.

History/Historical . a sovereign or monarch; king.

(in Great Britain) a son or grandson (if the child of a son) of a king or queen.

the English equivalent of any of various titles of nobility in other countries.

a holder of such a title.

the ruler of a small state, as one actually or nominally subordinate to a suzerain

Monaco is ruled by a prince.

a person or thing that is chief or preeminent in any class, group, etc.

a merchant prince.

a person possessing admirably fine and genial characteristics

He is a prince of a man.

noun

archduke , emeer , emir , monarch , nobleman , potentate , raja , rajah , royalty , ruler , sovereign