crucial

adjective

cru·​cial ˈkrü-shəl How to pronounce crucial (audio)
1
a
: important, significant
… what use we make of them will be the crucial question.Stanley Kubrick
Vitamins are crucial for maintaining good health.
b
: important or essential as resolving a crisis : decisive
She played a crucial role in the negotiations.
c
: marked by final determination of a doubtful issue
the crucial game of a series
2
archaic : cruciform
Choose the Right Synonym for crucial

acute, critical, crucial mean of uncertain outcome.

acute stresses intensification of conditions leading to a culmination or breaking point.

an acute housing shortage

critical adds to acute implications of imminent change, of attendant suspense, and of decisiveness in the outcome.

the war has entered a critical phase

crucial suggests a dividing of the ways and often a test or trial involving the determination of a future course or direction.

a crucial vote

Examples of crucial in a Sentence

Vitamins are crucial for maintaining good health. It's crucial that we arrive before 8 o'clock. Teachers are crucial to the success of the school. She played a crucial role in the meeting.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
As such, supplemental Federal assistance is crucial. Neal Earley, Arkansas Online, 23 May 2025 There's one more crucial step on Wi-Fi 7's quest to increase data rates: The new protocol will provide more channel bandwidth than ever before. PC Magazine, 22 May 2025 Southern states have caregiver programming, but Medicaid expansion is crucial, experts say In South Carolina there are more than 125,000 people living with dementia, according to the state's Alzheimer's Disease Registry. Madeline Mitchell, USA Today, 22 May 2025 Don’t Rely Solely On AI Or Translation Tools One crucial step marketers must take when expanding into a new market is conducting in-depth cultural and linguistic localization research—beyond just translation. Expert Panel®, Forbes.com, 22 May 2025 See All Example Sentences for crucial

Word History

Etymology

French, from Latin cruc-, crux cross

First Known Use

1706, in the meaning defined at sense 2

Time Traveler
The first known use of crucial was in 1706

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Cite this Entry

“Crucial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crucial. Accessed 29 May. 2025.

Kids Definition

crucial

adjective
cru·​cial ˈkrü-shəl How to pronounce crucial (audio)
1
: being a final or very important test or decision : decisive
the crucial game of a series
2
: very important : significant
water is a crucial element in our weather
crucially
ˈkrüsh-(ə-)lē
adverb
Etymology

from French crucial "having the form of a cross, being or involving a crisis," from Latin cruc-, crux "cross, trouble, torture" — related to cross, crucify, crux

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