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Discover LudwigThe phrase "Under lock and key" is correct and usable in written English
It is typically used to describe something that is securely locked away or kept safe from access. Example: "The valuable artifacts were kept under lock and key in the museum's vault."
Idiom
Under lock and key.
If something is under lock and key, it is stored very securely.
Exact(58)
Data is kept under lock and key.
(These are under lock and key).
Meantime, the bobblehead dolls are under lock and key.
Her mistress now keeps the ashtrays under lock and key.
The Proof resides in a notebook, under lock and key.
He collected guns and kept them under lock and key.
"We have it under lock and key," Lang said.
In fact, crucial details are kept under lock and key.
Until now, this movie has been under lock and key under French law.
(He is now under lock and key at a Seattle museum).
There are currently 10 statues, with Mark McGwire's under lock and key for the foreseeable future.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com