warn
Americanverb (used with object)
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to give notice, advice, or intimation to (a person, group, etc.) of danger, impending evil, possible harm, or anything else unfavorable.
They warned him of a plot against him. She was warned that her life was in danger.
- Synonyms:
- forewarn
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to urge or advise to be careful; caution.
to warn a careless driver.
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to admonish or exhort, as to action or conduct.
She warned her employees to be on time.
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to notify, advise, or inform.
to warn a person of an intended visit.
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to give notice to (a person, group, etc.) to go, keep at a distance, etc. (often followed by away, off, etc.).
A sign warns trespassers off the grounds. A marker warned boats away from the dock.
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to give authoritative or formal notice to (someone); order; summon.
to warn a person to appear in court.
verb (used without object)
verb
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to notify or make (someone) aware of danger, harm, etc
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(tr; often takes a negative and an infinitive) to advise or admonish (someone) as to action, conduct, etc
I warn you not to do that again
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(takes a clause as object or an infinitive) to inform (someone) in advance
he warned them that he would arrive late
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(tr; usually foll by away, off, etc) to give notice to go away, be off, etc
he warned the trespassers off his ground
Related Words
Warn, caution, admonish imply attempting to prevent another from running into danger or getting into unpleasant or undesirable circumstances. To warn is to speak plainly and usually in strong terms: to warn him about danger and possible penalties. To caution is to advise about necessary precautions, to put one on one's guard about possibly harmful circumstances or conditions, thus emphasizing avoidance of undesirable consequences: to caution him against driving in such weather. Admonish suggests giving earnest, authoritative advice with only tacit references to danger or penalty: to admonish a person for neglecting his duties.
Other Word Forms
- prewarn verb (used with object)
- rewarn verb (used with object)
- unwarned adjective
- warner noun
- well-warned adjective
Etymology
Origin of warn
First recorded before 1000; Middle English warnen, Old English warnian; cognate with German warnen; ware 2
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.
Many countries are planning similar moves, despite a warning from US Vice President JD Vance last year against "excessive regulation" that could stifle innovation.
From Barron's
Lord McDonald made a highly unusual intervention this week, saying he had tried to get in touch with No10 about the possibility of Dame Antonia being appointed and warning "more due diligence" was needed.
From BBC
The Met Office has issued a new weather warning for ice across northern parts of the UK.
From BBC
The court said it could not block a parade which has not happened yet, as there was no evidence of an election law violation -- but warned it could probe wrongdoing after the show.
From Barron's
In December this column warned, “I’d also watch Japanese bond yields as yen carry trades may be the source of the stock market’s hot air. For crypto too.”
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
