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Definitions

lock

[lok] / lɒk /
NOUN
device that fastens and bars free passage
Synonyms
STRONGEST
bolt grip latch
STRONG
bar bond catch clamp clasp clinch connection fastening fixture grapple hasp hook junction link padlock
Antonyms
STRONGEST
key
VERB
fasten, clasp
Synonyms
STRONGEST
close engage join press seal shut
STRONG
bar bolt button clench clutch embrace encircle enclose entwine grapple grasp hug latch link mesh secure unite
WEAK
button up turn the key
Antonyms
STRONGEST
disjoin open release unseal
STRONG
divide let go loose loosen separate unfasten unlock unloose
WEAK
unclasp

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Airlines do hedge prices, meaning they agree deals in advance that help them lock in a lower price.

From BBC • Apr. 23, 2026

That prompted some companies to lock in oil prices near $60 per barrel.

From MarketWatch • Apr. 23, 2026

He added that Xfinity Internet’s five-year price lock program and a multiyear network upgrade cycle could be the factors needed to arrest the slump.

From Barron's • Apr. 22, 2026

Copper prices have been soaring, and producers mostly lock in acid prices in advance.

From The Wall Street Journal • Apr. 16, 2026

Then he stepped in, shut my door, clicked the lock.

From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin

Vocabulary lists containing lock

Chapter 11: Growth and Expansion

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!