American English

Definition of nonchalant adjective from the Oxford Advanced American Dictionary

     

    nonchalant

     adjective
    adjective
    NAmE//ˌnɑnʃəˈlɑnt//
     
     
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  1. 1behaving in a calm and relaxed way; giving the impression that you are not feeling any anxiety synonym casual
  2. 2 to appear/look/sound nonchalant “It'll be fine,” she replied, with a nonchalant shrug.
nonchalance
 
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NAmE//ˌnɑnʃəˈlɑns//
 
noun [uncountable] synonym insouciance an air of nonchalance
nonchalantly
 
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adverb He was leaning nonchalantly against the wall. “I already know,” she replied nonchalantly.
See the Oxford Advanced Learner's Dictionary entry: nonchalant