01 n. A leader; a chief; a prince.
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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.
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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.
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3.
In some European countries, a sovereign prince, without the title of king.
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4.
The fists; as, put up your dukes.[slang]