Definition from Wiktionary, the free dictionary
- A department of a hospital where seriously ill or injured patients, often with life-threatening conditions that require urgent or immediate treatment, are brought in, usually by ambulance.
- emergency department
- accident and emergency (A&E)
- casualty (UK)
- emergency ward (EW)
- ER (abbreviation)
Hospital department primarily used for the treatment of the most serious, often life-threatening conditions