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



BrE BrE//ˈpiːsnɪk//
; NAmE NAmE//ˈpiːsnɪk//
(informal, sometimes disapproving)
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a pacifist (= somebody who believes war and violence are always wrong and refuses to fight) Word Origin 1960s: from peace + -nik.
See the Oxford Advanced American Dictionary entry: peacenik