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Definitions

crucial

[kroo-shuhl] / ˈkru ʃəl /
ADJECTIVE
critical, important
Synonyms
STRONGEST
bottom-line central compelling deciding decisive essential imperative momentous necessary pivotal pressing touchy urgent vital
WEAK
acute clamorous climactic desperate dire hanging by thread high-priority insistent on thin ice searching showdown touch and go
Antonyms
STRONGEST
inessential insignificant minor optional secondary trivial unimportant unnecessary voluntary
WEAK
uncritical

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.

Researchers believe the exaggerated length of the male palps may serve a crucial survival function.

From Science Daily • Apr. 6, 2026

Like many firms, HubSpot, has been hit by a crucial change in the way we search the internet.

From BBC • Apr. 6, 2026

Meanwhile, Wall Street has been reading local dispatches from Citrini Research regarding the Strait of Hormuz in hopes of gaining more insight about activity in the crucial waterway.

From MarketWatch • Apr. 6, 2026

To be clear, DeShazier thinks that solidarity is crucial.

From Salon • Apr. 6, 2026

The map and information in this journal could be invaluable, even crucial to helping her find the Shetani and bring it back to Baaz.

From "Beasts of Prey" by Ayana Gray

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.