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

 

affectation

 noun
noun
BrE BrE//ˌæfekˈteɪʃn//
 
; NAmE NAmE//ˌæfekˈteɪʃn//
 
[countable, uncountable]
 
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behaviour or an action that is not natural or sincere and that is often intended to impress other people His little affectations irritated her. Kay has no affectation at all. He raised his eyebrows with an affectation of surprise (= pretending to be surprised). He speaks clearly and without affectation. Word Origin mid 16th cent.: from Latin affectatio(n-), from the verb affectare ‘aim at’, frequentative of afficere ‘work on, influence’, from ad- ‘at, to’ + facere ‘do’.
See the Oxford Advanced American Dictionary entry: affectation