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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 Installation, Repair, and Replacement Residential & Commercial Lock Changes - We handle everything from standard grade 3 locks to high-security commercial locks by ensuring your …

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

Solve many security issues with the right lock. A heavy-duty combination lock or a padlock can secure outdoor storage, fences, self-storage units or lockers, keeping your belongings safe.

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a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a …

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In more complex mechanical lock/key systems, two different keys, one of which is known as the master key, serve to open the lock. Common metals include brass, plated brass, nickel silver, …

Nov 26, 2025 · Our new top pick is the Schlage Arrive Smart WiFi Deadbolt, due to its combination of robust hardware, simple installation and controls, top-tier security, and overall …