lockdown

lock·down  (lkdoun)

n.

1. The confinement of prison inmates to their cells as a security measure following a disturbance in the prison.

2. A prison, especially a high-security one.

3. A device that secures a piece of equipment, especially a computer, so that it cannot be moved or stolen.

Thesaurus

Noun

1.

lockdown - the act of confining prisoners to their cells (usually to regain control during a riot) internment, imprisonment - the act of confining someone in a prison (or as if in a prison)