a sudden serious and dangerous event or situation which needs immediate action to deal with it The government has declared a state of emergency following the earthquake. This door should only be used in an emergency. the emergency exit (= to be used in an emergency) The government had to take emergency action. The pilot made an emergency landing in a field. I always have some extra cash with me for emergencies. The government has been granted emergency powers (= to deal with an emergency).
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NAmE//ɪˈmərdʒənsi//(pl. emergencies) [countable, uncountable]