All these things are absolutely under lock and key, almost as if there were something they were ashamed of.
All classified publications and equipment are kept under lock and key and are available only to students with the appropriate security clearance.
Dangerous drugs are stored under lock and key in the custody of a medical officer or qualified dispenser.
The essential safeguard is to keep all medicines out of the reach of children, preferably under lock and key.
It has been suggested that their arms are to be kept under lock and key in some central place.
Inflation is no longer a serious issue: it is under lock and key.
In the majority of cases he will be in a cell with two others and will be under lock and key the whole time.
While prisoners are under lock and key they cannot be breaking into people's homes.
