What does "locker" mean?

Locker: A drawer, cupboard, compartment, or chest, esp. one in a ship, that may be closed with a lock. Chain locker (Naut.), a compartment in the hold of a vessel, for holding the chain cables. -- Davy Jones's locker, or Davy's locker. See Davy Jones. -- Shot locker, a compartment where shot are deposited. Totten.