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English definition of “eternity”

eternity

noun uk   /ɪˈtɜː.nɪ.ti/ us    /-ˈtɝː.nə.t̬i/
[U] time that never ends or that has no limits: They haven't been given these rights for (all) eternity - they should justify having them just like most other people have to. Religions gain some of their worldly power by claiming they have the key to eternity (= a state of existence outside normal life). an eternity a very long time: The film went on for what seemed like an eternity. Nine months is a long time for anyone, but it's an eternity for the very young.
(Definition of eternity from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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SMART Thesaurus: Long periods of time

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