Arising from or used in an emergency.
A situation which poses an immediate risk and which requires urgent attention.
An individual brought in at short notice to replace a member of staff, a player in a sporting team, etc.
The department of a hospital that treats emergencies.
Any composition, musical or otherwise, that is created on the spot without preparation.
A short musical composition for an informal occasion often with the character of improvisation and usually to be played solo.
Improvised; without prior preparation, planning or rehearsal.