when hell freezes over Meaning in Cambridge English Dictionary
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Meaning of "when hell freezes over" - English Dictionary

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when hell freezes over

informal
If you say that something will happen when hell freezes over, you mean that it will never happen.
Translations of “when hell freezes over”
in Chinese (Traditional) 根本不可能(發生)…
in Chinese (Simplified) 根本不可能(发生)…
(Definition of when hell freezes over from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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