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

 

nonchalance

 noun
noun
BrE BrE//ˈnɒnʃələns//
 
; NAmE NAmE//ˌnɑːnʃəˈlɑːns//
 
[uncountable]
 
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a calm and relaxed way of behaving; behaviour that gives the impression you are not feeling any anxiety synonym casualness (2) an air of nonchalance