/ iˈmɜːdʒənsi; NAmE iˈmɜːrdʒ-/ noun
( pl. -ies ) [ C , U ] 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) .
mid 17th cent.: from medieval Latin emergentia , from Latin emergere arise, bring to light, from e- (variant of ex- ) out, forth + mergere to dip.