Definition of flighty adjective from the Oxford Advanced Learner's Dictionary

 

flighty

 adjective
adjective
BrE BrE//ˈflaɪti//
 
; NAmE NAmE//ˈflaɪti//
 
(informal)
 
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a flighty woman is one who cannot be relied on because she is always changing activities, ideas and partners without treating them seriously Word Origin mid 16th cent.: from flight + -y.
See the Oxford Advanced American Dictionary entry: flighty