Lock Down Definition

verb

To secure ; make people stay locked indoors for their safety.

Police have the area locked down until the situation is all-clear.
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To limit the use of a computer network to only users with permission.

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To make an arrangement secure, definite, or permanent; fix.

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To cause another to enter into an exclusive romantic relationship.
It took me some time, but I finally locked her down.
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( LOCK DOWN of locks on a waterway in a downhill direction

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