under lock and key

1. Securely locked up, as in He keeps the wine under lock and key. [First half of 1500s]

Example Sentences

Maybe we’ll find ourselves under lock and key across the street in the Eisenhower Executive Office Building.

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A Peaky Blinders film will be released soon by Netflix, although Murphy said the plot line is still under lock and key.

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Wirtz could provide an option on the flank, but Liverpool's wide areas appear to be under lock and key.

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He could provide an option on the flank, but Liverpool's wide areas appear to be under lock and key.

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His sister can’t even imagine what he gets up to with all those suspect books he keeps piled up under lock and key.

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Related Words

• caged www.thesaurus.com
• enslaved 
• imprisoned www.thesaurus.com
• incommunicado