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

 

frivolously

 adverb
adverb
BrE BrE//ˈfrɪvələsli//
 
; NAmE NAmE//ˈfrɪvələsli//
 
(disapproving)
 
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in a way that is silly or amusing, especially when such behaviour is not suitable