emergencye·mer·gen·cy /ɪˈmɜːdʒənsi-ɜːr-/ noun (plural emergencies) [countableC]1an unexpected and dangerous situation that must be dealt with immediatelyRing this number in case of an emergency.
2emergency repairs/meeting/reserves etc work, a meeting, money etc needed to deal with an urgent and unexpected problemWorkmen are carrying out emergency repairs to the bridge.
emergency reserves held at the Bank of England