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English definition of “lock”

lock

noun [C] (FASTENER)    /lɒk/ US  /lɑːk/
B1 a device that prevents something such as a door from being opened and can only be opened with a key: I heard someone turn a key in the lock. safety locks Thieves got in by smashing the lock off the door. → See also padlock nounLocks and locksmithing
(Definition of lock noun (FASTENER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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