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 been warning
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present perfect progressiveof warn.present perfect progressive
Used to describe an action that began in the past, has continued continuously, and is still in progress.
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.
Multiple leading researchers, including Geoffrey Hinton and Yoshua Bengio, have been warning about catastrophic risks from rapidly advancing AI for years.
From Los Angeles Times ● Sep. 11, 2026
U.S. oil-and-gas executives have been warning for months that the country risked wrestling with higher fuel prices.
From The Wall Street Journal ● Sep. 4, 2026
Economists and other academic researchers have been warning for decades that this was precisely the sort of problem that the Low-Income Housing Tax Credit was likely to create.
From Salon ● Jul. 4, 2026
Strategists have been warning that the recent selloff in bond markets presents a huge challenge for this AI-powered bull market, especially if the 10-year Treasury yield reaches 5%.
From MarketWatch ● May 21, 2026
Ever since I arrived in Minnesota people have been warning me about the extreme cold that’s on the way.
From "Orphan Train" by Christina Baker Kline
