caution

American  

[kaw-shuhn] / ˈkɔ ʃən /

noun

1. alertness and prudence in a hazardous situation; care; wariness.

   Landslides ahead—proceed with caution.

   Synonyms:

   vigilance, heed, watchfulness, discretion, circumspection

   Antonyms:

   carelessness

2. a warning against danger or evil; anything serving as a warning.

   By way of caution, he told me the difficulties I would face.

   Synonyms:

   counsel, advice, admonition

3. Informal. a person or thing that astonishes or causes mild apprehension.

   She's a caution. The way he challenges your remarks is a caution.

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verb (used with object)

1. to give warning to; advise or urge to take heed.

   Synonyms:

   forewarn, admonish

verb (used without object)

1. to warn or advise.

   The newspapers caution against overoptimism.

caution British  

/ ˈkɔːʃən /

noun

1. care, forethought, or prudence, esp in the face of danger; wariness

2. something intended or serving as a warning; admonition

3. law a formal warning given to a person suspected or accused of an offence that his words will be taken down and may be used in evidence

4. a notice entered on the register of title to land that prevents a proprietor from disposing of his or her land without a notice to the person who entered the caution

5. informal an amusing or surprising person or thing

   she's a real caution

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verb

1. (tr) to urge or warn (a person) to be careful

2. (tr) law to give a caution to (a person)

3. (intr) to warn, urge, or advise

   he cautioned against optimism

caution Idioms  

1. see throw caution to the winds.

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Related Words

See warn.

Other Word Forms

• cautioner noun
• overcaution noun
• recaution verb (used with object)
• supercaution noun
• uncautioned adjective
• well-cautioned adjective

Etymology

Origin of caution

First recorded in 1250–1300; Middle English caucion, from Latin cautiōn-, stem of cautiō “a taking care,” from caut(us) “taken care” (past participle of cavēre “to take care”) + -iō -ion; caveat

Example Sentences

“Out of an abundance of caution, he agreed with his security detail’s recommendation to see a physician before the three-hour drive home,” the court said on Friday.

From The Wall Street Journal • Apr. 3, 2026

People have been advised to stay in the lower levels of their homes, avoid windows, watch for falling debris and tree limbs, and use caution if they want to drive.

From Los Angeles Times • Apr. 2, 2026

Bitcoin, which neared $75,000 early in the conflict, has since fallen 8%, contributing to investor caution.

From Barron's • Apr. 1, 2026

But before investors get too excited, traders at a handful of major Wall Street institutions have continued to urge caution.

From MarketWatch • Apr. 1, 2026

If only I’d warned my sisters of La Llorona’s caution to be humble and good, we wouldn’t be in this mess.

From "Summer of the Mariposas" by Guadalupe García McCall

Related Words

• attention
• care
• discretion
• foresight
• prudence
• vigilance