Definition of airily adverb from the Oxford Advanced Learner's Dictionary

 

airily

 adverb
adverb
BrE BrE//ˈeərəli//
 
; NAmE NAmE//ˈerəli//
 
(formal)
 
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in a way that shows that you are not worried or that you are not treating something as serious ‘There’s nothing wrong with him,’ she said airily.
See the Oxford Advanced American Dictionary entry: airily