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 with set …

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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.

Define lock. lock synonyms, lock pronunciation, lock translation, English dictionary definition of lock. n. 1. A device operated by a key, combination, or keycard and used, as on a door, for holding, closing, or …

Oct 17, 2024 · Locks are the first line of defense for your home's security. Read our guide to learn about the most effective locks and how to install them.

Dec 9, 2025 · After 40 hours of research and interviews with locksmiths and security experts, the Schlage B60N deadbolt is the best door lock for most homes.