Quick definitions from WordNet (safe-deposit)
▸ noun: a fireproof metal strongbox (usually in a bank) for storing valuables
▸ adjective: safe for the storage of valuables ("Kept the deed in his safe-deposit box at the bank")
▸ noun: a fireproof metal strongbox (usually in a bank) for storing valuables
▸ adjective: safe for the storage of valuables ("Kept the deed in his safe-deposit box at the bank")