Definition of affectation noun from the Oxford Advanced American Dictionary

 

affectation

 noun
noun
NAmE//ˌæfɛkˈteɪʃn//
 
[countable, uncountable]
 
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behavior or an action that is not natural or sincere and that is often intended to impress other people His little affectations irritated her. Kayla has no affectations at all. He raised his eyebrows with an affectation of surprise (= pretending to be surprised).
See the Oxford Advanced Learner's Dictionary entry: affectation