Definitions of safe
a heavy metal box that is secure and very difficult to open, used for keeping valuable items such as documents, money, or jewellery etc
A drug addict has been jailed after stealing a safe in order to fund his habit.
Phrase Bank for safe
His burgeoning collection exceeded the size of the small safe he kept in his home.
When the valuables are stored in a safe, the key of the safe shall be kept securely in the personal custody of the Custodian.
He kept looking around and noticed a safe was missing from a closet.