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.

LOCK meaning: 1 : a device that keeps something (such as a door, window, or box) from being opened and that is usually opened by using a key; 2 : an area in a canal or river that has gates …

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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.

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 …

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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.

Jan 21, 2025 · Shopping for a door lock or smart lock? Read about types, features, and other must-know topics in our door lock buying guide to make an informed choice.