Definitions
1.NounThe male ruler of a duchy (female equivalent: duchess).
2.NounThe sovereign of a small state.
3.NounA high title of nobility; the male holder of a dukedom.
4.NounA grand duke.
5.NounAny of various nymphalid butterflies of the Asian genera Bassarona and Dophla.
6.NounA fist."Put up your dukes!"
7.VerbTo hit or beat with the fists.
8.VerbTo give cash to; to give a tip to."I duked him twenty dollars."
9.VerbTo perform the duties of, or rule over as, a duke.