Definition of archduke noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɑːtʃˈdjuːk//
; NAmE NAmE//ˌɑːrtʃˈduːk//
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(in the past) a son of the Emperor of Austria Archduke Franz Ferdinand compare grand duke Word Originearly 16th cent.: from Old French archeduc, from Latin archidux, archiduc-, from archi- ‘chief’ + dux, duc- ‘leader’; related to ducere ‘to lead’.
See the Oxford Advanced American Dictionary entry: archduke