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



(especially US English demeanor) noun
BrE BrE//dɪˈmiːnə(r)//
; NAmE NAmE//dɪˈmiːnər//
[uncountable] (formal)
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the way that somebody looks or behaves He maintained a professional demeanour throughout. Word Originlate 15th cent.: from demean in the archaic sense ‘behaviour’, probably influenced by obsolete havour ‘behaviour’.