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.

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a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a …

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.

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 …

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 …

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.

Shop Best Buy for smart locks. Manage home security remotely from your phone with smart locksets. Find keypad door locks in stores & online for your entryways.