Definition of perpetuity noun from the Oxford Advanced American Dictionary

 

perpetuity

 noun
noun
NAmE//ˌpərpəˈtuət̮i//
 
[uncountable]
 
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Idioms
in perpetuity(formal)
 
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for all time in the future synonym forever They do not own the land in perpetuity. The trust fund will ensure preservation of the site in perpetuity.
See the Oxford Advanced Learner's Dictionary entry: perpetuity