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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

Doncic, a leading candidate for most valuable player and a lock for his sixth All-NBA team, played in only 64 games before he suffered a regular-season ending left hamstring injury on April 2.

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

But these weren’t championship contenders chasing one last win to lock down a playoff slot.

From The Wall Street Journal • Apr. 14, 2026

“I wanted to change, but somebody was in an all fire hurry to look at the new recruits,” Serina said, pushing a dripping blond lock of hair out of her eyes to glare at Sam.

From "Glitch" by Laura Martin

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!