Lockdown, in the context of imprisonment, refers to a security measure used in correctional facilities to restrict the movement of inmates. This can occur during emergencies, such as riots or threats to safety, where inmates are confined to their cells or specific areas to maintain order and security. During a lockdown, access to common areas, such as recreation yards and dining halls, is limited or suspended. Staff members closely monitor the situation, and communication with the outside world may be restricted. Lockdowns are intended to protect both inmates and staff while addressing potential risks within the facility.