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

 

ephemeral

 adjective
adjective
BrE BrE//ɪˈfemərəl//
 
; NAmE NAmE//ɪˈfemərəl//
 
(formal)
 
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lasting or used for only a short period of time synonym short-lived ephemeral pleasures leaflets, handouts and other ephemeral material It is a critic’s job to follow every ephemeral fashion. Word Origin late 16th cent.: from Greek ephēmeros (see ephemera) + -al.
See the Oxford Advanced American Dictionary entry: ephemeral