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| lock·down [ lók dòwn ] (plural lock·downs) |
noun |
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| Definition: |
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1. confinement for safety: an emergency safety procedure in which people remain in a locked indoor space
  When an unknown intruder entered the building, the principal ordered the school into lockdown.
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2. computer locking device: a locking device that prevents a computer from being moved or stolen
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3. online computer security procedure: the prevention of access by users of a computer network or intruders from the Internet to files essential to the integrity of a computer system
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4. confinement to prison cell: the state of being confined to a prison cell for all or most of the day
(
slang
)
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