Definitions

warn

[wawrn] / wɔrn /

VERB

give notice of possible occurrence

Synonyms

STRONGEST

address advise alert caution hint inform instruct notify order predict prepare prompt recommend remind signal suggest summon tell threaten urge

STRONG

acquaint admonish advocate apprise clue counsel deprecate direct dissuade enjoin exhort forbid forearm forewarn guide post prescribe remonstrate reprove tip

WEAK

clue in cry wolf fill in give fair warning give the high sign give warning lay it out make aware put on guard tip off wise up

Antonyms

STRONGEST

conceal discourage disorganize dissuade hide ignore prevent

STRONG

allow approve commend compliment laud misguide mislead neglect permit praise withhold

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.

South Australia is home to a booming koala population, but researchers warn that this apparent conservation success could eventually turn into a serious problem.

From Science Daily • Jun. 8, 2026

Analysts warn that a severe El Niño could raise global food commodity prices by up to 9%.

From MarketWatch • Jun. 8, 2026

In a rare move, he was named publicly as Robert Albon by a family court judge after a case in Cardiff, to warn of the dangers of unregulated sperm donation.

From BBC • Jun. 7, 2026

Analysts warn that as many as a third of crypto ETFs could shut within two years, leaving investors with an unwelcome disruption.

From The Wall Street Journal • Jun. 4, 2026

And if a plane really was going to run into the building, wouldn’t Sky Trails want its employees to warn people, to get them out of the way?

From "Found" by Margaret Peterson Haddix

Vocabulary lists containing warn

"The Secret Water"

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"The Black Ferris" by Ray Bradbury

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Tasting the Sky

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!