The meaning of LOCK is a fastening (as for a door) operated by a key or a combination. How to use lock in a sentence.

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LOCK definition: 1. a device that prevents something such as a door from being opened and can only be opened with a…. Learn more.

Replace or cut new keys for padlocks, enclosures, cabinet doors, and locksets.

Define lock. lock synonyms, lock pronunciation, lock translation, English dictionary definition of lock. n. 1. A device operated by a key, combination, or keycard and used, as on a door, for holding, closing, or …

LOCK definition: a device for securing a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a key, …