A safe deposit box is a locked box in a bank vault for valuables. Rent a safe deposit box.
The bank does not know what is in it and insures nothing inside it. A safe deposit box needs two keys, and the bank holds only one of them.
1nounsafe deposit boxA locked box in a bank vault for valuables.
“The safe deposit box held papers and one ring.”
safe deposit box is a box.
Practised in Bank & Post Office