- (in Continental Europe) the male ruler of a duchy; the sovereign of a small state.
- a British nobleman holding the highest hereditary title outside the royal family, ranking immediately below a prince and above a marquis; a member of the highest rank of the British peerage.
- a nobleman of corresponding rank in certain other countries.
- a cultivated hybrid of the sweet and sour cherry.
- fists; hands: Put up your dukes.
- to hit or thrash with the fists (sometimes followed by out): He duked me because he said I had insulted him.The bully said he was going to duke out anyone who disagreed.
- to fight, especially with the fists; do battle:The adversaries were prepared to duke it out in the alley.
- and his brother, James Buchanan, 1856–1925, U.S. industrialists.
- a male given name.
- a nobleman of high rank: in the British Isles standing above the other grades of the nobility
- the prince or ruler of a small principality or duchy
