Definition of impermanent adjective from the Oxford Advanced American Dictionary

 

impermanent

 adjective
adjective
NAmE//ɪmˈpərmənənt//
 
(formal)
 
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that will not last or stay the same forever opposite permanent
impermanence
 
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NAmE//ɪmˈpərmənəns//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: impermanent