An unstable situation, in political, social, economic or military affairs, especially one involving an impending abrupt change.
A crucial or decisive point or situation; a turning point.
A traumatic or stressful change in a person's life.
A sudden change in the course of a disease, usually at which point the patient is expected to either recover or die.
A point in a drama at which a conflict reaches a peak before being resolved.
A situation which poses an immediate risk and which requires urgent attention.
Arising from or used in an emergency.
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.