[ noun ] a strongly made box for holding money or valuables; can be locked <noun.artifact>
strongbox \strong"box`\, n. A box of rigid and durable construction fitted with a lock, used for the purpose of protecting valuable items, such as jewelry or money.
Syn: lockbox. [PJC]
Albert Prezio. "It was only within a few feet from her window where she sat most every day." Authorities unearthed a small strongbox and the remains of the baby.