- an emergency security procedure in which prison inmates are locked in their cells and denied the usual privileges of dining, showering, etc. outside of them
- any emergency security procedure in which authorities prohibit persons from leaving a building, compound, etc.
- a. A protocol followed in an emergency that involves confining people in a secure place, such as the confinement of prison inmates in cells after a disturbance, or the locking of students and teachers in classrooms after a violent attack.b. A situation in which this protocol is undertaken.
- A facility, such as a prison, where people considered to be dangerous are locked inside living quarters or otherwise confined.
lockdown - Legal Definition