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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.

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

"Instead, there is a tendency to pause before booking and waiting until later to lock in plans."

From BBC • Apr. 18, 2026

According to Amazon MGM’s press release, the film’s story details “are being kept under lock, key and an industrial-strength Schwartz shield.”

From Los Angeles Times • Apr. 16, 2026

Deutsche Bank’s Jim Reid laid out a few in commentary shared with MarketWatch on Wednesday, where he noted that stocks have started to decouple from crude-oil prices while bonds continued to trade in lock step.

From MarketWatch • Apr. 15, 2026

While Bat was double-checking the lock on his bike outside the Sugar Shack, he heard someone say his name.

From "A Boy Called Bat" by Elana K. Arnold

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!