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 (something) in or lock in (something) : to do something that makes you sure to get (something that could change, such as a good price, an interest rate, etc.)

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 …

LOCK meaning: 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 with set …

Find the best smart lock for your home, ensure your doors are locked by checking an app, and stop worrying about it. You can also use a code or fingerprint for entry or remotely let in friends and relatives.

Dec 20, 2025 · lock (plural locks) Something used for fastening, which can only be opened with a key or combination. quotations

Shop through a wide selection of Door Locks at Amazon.com. Free shipping and free returns on Prime eligible items.

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 · Our new top pick is the Schlage Arrive Smart WiFi Deadbolt, due to its combination of robust hardware, simple installation and controls, top-tier security, and overall reliability. The Yale...