1. (n.) A leader; a chief; a prince.

2. (n.) 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. (n.) In some European countries, a sovereign prince, without the title of king.

4. (v. i.) To play the duke.

Brahman archduke aristocrat armiger baron baronet blue blood count daimio earl esquire gentleman grand duke grandee hidalgo lace-curtain laird landgrave lord lordling magnate magnifico margrave marquis noble nobleman optimate palsgrave patrician peer seigneur seignior silk-stocking squire swell thoroughbred upper-cruster viscount waldgrave