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English definition of “emergency”

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.
(Definition of emergency from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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