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.
Something that perplexes.
The state or quality of being perplexed; puzzled or confused.
In information theory, a measurement of how well a probability distribution or model predicts a sample.