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

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, and steel. The …

Take your security to the next level with dependable door hardware from Ace. Shop reliable door knobs and locks, deadbolts and electronic locking systems.

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a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a key, …

These smart locks make it easy to bring your door online and manage it from anywhere. After testing the best smart locks on the market, these are my favorites.

Lock, mechanical device for securing a door or receptacle so that it cannot be opened except by a key or by a series of manipulations that can be carried out only by a person knowing the secret or code.

Jun 12, 2025 · We tested top door locks from brands like Yale, Schlage, and Kwikset to find the most secure and stylish ones that protect your home, including deadbolts, keypads, and smart locks.

Shop secure smart locks, door locks, door knobs, door levers, and handlesets from Schlage. Find the right lock for your exterior and interior doors here.

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 security solutions.