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.

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, …

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

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a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a …

Master Lock is recognized around the world as the authentic, enduring name in locks, combination padlocks and security products. Learn more about our extensive assortment of …

This product can be controlled with your voice through Alexa-enabled devices such as Amazon Echo and Amazon Tap. This product has sustainability features recognized by trusted …

Nov 10, 2025 · We evaluate the most popular models, installing and testing them in our homes to help you decide which one to buy. With an outstanding 4.5-star rating and an Editors' Choice …

Take our quiz to find the perfect Yale Assure Lock® 2 that fits into your life and complements your favorite door style, paint colors, and matching door hardware.