Duke n.
 1. A leader; a chief; a prince. [Obs.]
    Hannibal, duke of Carthage.   --Sir T. Elyot.
    All were dukes once, who were =\“duces” -- captains or leaders of their people.\=   --Trench.
 2. In England, one of the highest order of nobility after princes and princesses of the royal blood and the four archbishops of England and Ireland.
 3. In some European countries, a sovereign prince, without the title of king.
 Duke's coronet. See Illust. of Coronet.
 To dine with Duke Humphrey, to go without dinner. See under Dine.