locks down
Seals off completely
To lock down is to secure completely, restricting movement or access.
A prison locks down during a riot.
A school locks down during a threat.
The pandemic lockdown made the term ubiquitous—entire cities locked down to prevent disease spread.
In computing, locking down a system means restricting it to authorized users or functions.
Management locks down the budget every December.
- padlockPortable locking device
- firewallNetwork access control system
- quarantineIsolation preventing disease transmission
- two-factor authenticationIdentity confirmation requiring two proofs
- security protocolRules governing safe access
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