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English definition of “emergency”

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emergency

noun [C or U] uk   /ɪˈmɜː.dʒən.si/ us    /-ˈmɝː-/
B1 something dangerous or serious, such as an accident, which happens suddenly or unexpectedly and needs fast action in order to avoid harmful results: How would disabled people escape in an emergency? Is the emergency exit suitable for wheelchairs? The pilot of the aircraft was forced to make an emergency landing on Lake Geneva.
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(Definition of emergency from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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