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to lock down
01
to restrict access to a place or area, usually for security or safety reasons
Transitive
Grammatical Information
Composition
phrasal
action verb
regular
separable
particle
down
base verb
lock
present tense
lock down
3rd person singular
locks down
present participle
locking down
past simple
locked down
past participle
locked down
Examples
The school had to lock down during the threat.
