lockdown

play
noun lock·down \ˈläk-ˌdau̇n\

Definition of lockdown

  1. 1 :  the confinement of prisoners to their cells for all or most of the day as a temporary security measure

  2. 2 :  an emergency measure or condition in which people are temporarily prevented from entering or leaving a restricted area or building (such as a school) during a threat of danger … the school went on lockdown when a student brought a pellet gun to campus. — Ian Gordon

1973

First Known Use of lockdown

1973


Law Dictionary

lockdown

play
noun lock·down \ˈläk-ˌdau̇n\

Legal Definition of lockdown

  1. :  the confinement of prisoners to their cells for a temporary period as a security measure



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