Locker \Lock"er\, n. 1. One who, or that which, locks. 2. 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.