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English definition of “be a matter of life and/or death”

be a matter of life and/or death

C2 to be very serious: And if you miss the bus, well, it's not a matter of life and death.Very important or urgent
(Definition of be a matter of life and/or death from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “be a matter of life and/or death”

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