
under lock and key
This page is about the idiom under lock and key
Meaning
If something is under lock and key, it is kept in a very secure place.
For example
- Make sure these documents are under lock and key until we need them.
- Poor Josie. Her parents were very strict and they kept her under lock and key throughout her childhood, so she never learned about life's dangers.
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Contributor: Matt Errey