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.
Several GP practices across the UK have warned of potential problems, with some instructing patient to make urgent queries over the phone instead of by email or web form.
From BBC ● Nov. 13, 2026
Some Arab states have warned Iran they could retaliate individually or collectively if Tehran targets their infrastructure, the mediators said.
From The Wall Street Journal ● Nov. 2, 2026
Top military and political officials in Iran have warned against any new attack.
From Barron's ● Nov. 1, 2026
Others, including Damped Spring Advisors founder Andy Constan, have warned that a bubble isn’t forming in stock prices but rather in projected earnings.
From MarketWatch ● Nov. 1, 2026
If I had been here, maybe I could have warned them.
From "The Light in Hidden Places" by Sharon Cameron
