Definition of perpetuity noun from the Oxford Advanced Learner's Dictionary

 

perpetuity

 noun
noun
BrE BrE//ˌpɜːpəˈtjuːəti//
 
; NAmE NAmE//ˌpɜːrpəˈtuːəti//
 
[uncountable]
 
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Word Origin late Middle English: from Old French perpetuite, from Latin perpetuitas, from perpetuus ‘continuing throughout’, from perpes, perpet- ‘continuous’.Idioms
in perpetuity
 
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(formal) 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 American Dictionary entry: perpetuity