Search Dictionary
Definition of lock

lock

/lɑːk/
lock

Plural:locks
•
Past Simple:locked
•
Past Participle:locked
•
Present Participle:locking
JUMP TO:

lock Lexical Profile

lock Game Scores & Validity

• noun

1

A mechanical or electronic fastening device that is released by a physical object, by supplying secret information, or by a combination of both.

Example

"She turned the heavy brass key in the lock and slowly pushed the wooden door open."


2

A piece, curl, or small section of hair that hangs together.

Example

"A stray lock of dark hair fell across his forehead as he bent over the document."


3

A section of a canal or river that is closed off by gates, used to raise or lower boats between different water levels.

Example

"The narrowboat slowly rose as water flooded into the lock from the upstream gates."

Synonyms
View all synonyms for lock

• verb

1

To fasten or secure something (such as a door, window, or container) with a mechanical or electronic locking device.

Example

"Please remember to lock the front door and arm the security system before you leave."


2

To become firmly fixed, jammed, or incapable of moving.

Example

"The gears on my older bicycle tend to lock if I try to shift them too rapidly on a steep hill."


3

To interlock, clasp, or entangle firmly together.

Example

"The peaceful protesters locked arms to form an unbreakable human chain across the entrance."

Synonyms
View all synonyms for lock
Antonyms
View all antonyms for lock

• Rhymes for lock

Word Origin & Etymology

Modern English 'lock' merges two distinct Old English words: 'loc' (meaning a fastening, bolt, or enclosure) of Proto-Germanic origin, and 'locc' (meaning a tress or curl of hair), also from a separate Proto-Germanic root.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Lock. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/lock
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.