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Definition lock down in British English

lock down phrasal verb

[transitive] phrasal verb
1

to make people stay in a locked indoor space during an emergency in order to keep them safe

Example

Police have locked down the entire area.

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2

to limit use of a computer network to only the users who have permission to use it

Example

Make sure the stuff you post to Facebook is locked down tight.

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3

to make an arrangement definite so that it will not change

Example

We need to lock down the new schedule as soon as possible.

Synonyms and related words
Definition lock down in British English