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.

A heavy-duty combination lock or a padlock can secure outdoor storage, fences, self-storage units or lockers, keeping your belongings safe. When purchasing a combination lock, choose one …

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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.

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Oct 9, 2025 · Upgrade your locks with fingerprint-scanning or a keypad, whether it’s at the front door or a sliding glass entryway.

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a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a …

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