under lock and key
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
People tend not to realize the information they’re sharing with AI models belongs under lock and key, she says, especially matters of personal finance, for instance.
From The Wall Street Journal • Jun. 28, 2026
Maybe we’ll find ourselves under lock and key across the street in the Eisenhower Executive Office Building.
From Salon • Nov. 7, 2025
He could provide an option on the flank, but Liverpool's wide areas appear to be under lock and key.
From BBC • Jun. 14, 2025
His sister can’t even imagine what he gets up to with all those suspect books he keeps piled up under lock and key.
From Los Angeles Times • May 21, 2025
"Papa'll keep me under lock and key after this!"
From "The Whipping Boy" by Sid Fleischman
