Definition of permanence noun from the Oxford Advanced American Dictionary

 

permanence

 noun
noun
NAmE//ˈpərmənəns//
 
(permanency
NAmE//ˈpərmənənsi//
 
)
[uncountable]
 
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the state of lasting for a long time or for all time in the future The spoken word is immediate but lacks permanence. We no longer talk of the permanence of marriage.
See the Oxford Advanced Learner's Dictionary entry: permanence