under lock and key
The phrase "under lock and key" is used to describe something or someone that is securely confined or protected to prevent unauthorized access or escape.
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Definition
B2Security
(common)Stored or confined in a secure place to prevent unauthorized access.
Example
- The confidential documents were kept under lock and key.
- The prisoner was held under lock and key to prevent any chance of escape.
B2Protection
(common)Kept in a safe or protected place, usually under strict control.
Example
- The rare artifacts are under lock and key to ensure their preservation.
- She keeps her valuables under lock and key.
Similar
Terms that have similar or relatively close meanings to "under lock and key":
locked uplock uplock onlock downlocked and loadedjail locksafety locklock inbehind closed doorsbox and locktriple locklock outunder seallock intounder control