under lock and key
idiom
: in a room, box, etc., that is locked
The jewels are kept under lock and key.
The prisoner is being kept/held under lock and key.
Examples of under lock and key in a Sentence
Recent Examples on the Web
Details about the sequel’s story, written by the original film’s screenwriter Aline Brosh McKenna, are under lock and key.
—
Andrew McGowan, Variety, 22 Nov. 2025
As is almost always the case in such matters, details of the settlement are under lock and key.
—Dominic Patten, Deadline, 29 Oct. 2025
The food pantry was also kept under lock and key, officials said.
—Mason Leath, ABC News, 17 Oct. 2025
According to Us Weekly sources, the details were kept under lock and key—even from guests, who would be shuttled to and from their hotel to avoid leaks.
—Emily Tannenbaum, Glamour, 28 Sep. 2025
See All Example Sentences for under lock and key
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Andrew McGowan, Variety, 22 Nov. 2025
As is almost always the case in such matters, details of the settlement are under lock and key.
—Dominic Patten, Deadline, 29 Oct. 2025
The food pantry was also kept under lock and key, officials said.
—Mason Leath, ABC News, 17 Oct. 2025
According to Us Weekly sources, the details were kept under lock and key—even from guests, who would be shuttled to and from their hotel to avoid leaks.
—Emily Tannenbaum, Glamour, 28 Sep. 2025
See All Example Sentences for under lock and key
Cite this Entry
“Under lock and key.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/under%20lock%20and%20key. Accessed 29 Nov. 2025.
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