Lock"er (?), n.
One who, or that which, locks.
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, ∨ Davy's locker. See Davy Jones. -- Shot locker, a compartment where shot are deposited.
© Webster 1913.