warn
verb (used with object)
to give notice, advice, or intimation to (a person, group, etc.) of danger, impending evil, possible harm, or anything else unfavorable.
have warned
-
present perfectof warn.present perfect
Used to describe actions that started in the past and continue into or have direct relevance to the present.
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.
Aid groups have warned that the humanitarian crisis is far from over.
From Barron's ● Sep. 26, 2026
It is the second time health officials have warned about a flea-borne typhus outbreak in the county.
From Los Angeles Times ● Sep. 24, 2026
Tourism bosses have warned owners of holiday cottages will be forced to sell amid the government's plans to tax tourist rentals as second homes rather than as a businesses, the Daily Telegraph reports.
From BBC ● Sep. 17, 2026
Experts have warned cyberattacks on ships can be extraordinarily dangerous, depending upon the sophistication and the type of vessel involved.
From The Wall Street Journal ● Sep. 16, 2026
Of all the slaves of the Dark Lord, only the Nazgûl could have warned him of the peril that crept, small but indomitable, into the very heart of his guarded realm.
From "The Return of the King" by J.R.R. Tolkien
