The Simple English Wikipedia has an article on: Duke Pronunciation (UK) IPA (key): /djuːk/ (US) IPA (key): /duːk/ Audio (US)(file) Noun Singular duke Plural dukes (nobility) (countable) A duke is the husband of a duchess and the male ruler of a duchy. The duke of Lorraine is very old. (countable) A duke is a high British nobleman.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads