warned; warning; warns

transitive verb

1
a
: to give notice to beforehand especially of danger or evil
b
: to give admonishing advice to : counsel
c
: to call to one's attention : inform
2
: to order to go or stay away
often used with off
warner noun

Examples of warn in a Sentence

I had been warned about the difficulties of the job. She warned me that the stove was still hot. “This won't be easy,” he warned. Nobody warned me about the dangers. I warned him to be careful, but he didn't listen to me. She warned us not to go too close to the fire.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The bill in early March drew a significant fiscal note, which warned the costs of the legislation were hard to determine but the state could lose more than $1 billion in federal funding over the measure. Vivian Jones, The Tennessean, 21 Aug. 2025 Officials warned the road – known to flood even during seasonal high tides – could be impassable for days. Dinah Voyles Pulver, USA Today, 21 Aug. 2025 Because an array of energy intensive heavy industries from fertilizer manufacturers to aluminum recyclers are warning of temporary shutdowns to permanent closures due to gas shortages and high prices. Gaurav Sharma, Forbes.com, 20 Aug. 2025 Christ himself warned that reading the signs of apocalypse would be no less difficult than divining a dominatrix’s disdain: Then if any man shall say unto you, Lo, here is Christ, or there; believe it not. Michael Robbins, Harpers Magazine, 20 Aug. 2025 See All Example Sentences for warn

Word History

Etymology

Middle English warnen, going back to Old English wearnian, warnian "to be on one's guard, make aware, put on one's guard," going back to West Germanic *warnōjan- (whence Middle Dutch waernen "to provide with, give notice of a danger," Old High German warnōn), probably causative derivative of Germanic *wara- "cognizant, watchful" — more at ware entry 1

First Known Use

before the 12th century, in the meaning defined at transitive sense 1a

Time Traveler
The first known use of warn was before the 12th century

Browse Nearby Words

Cite this Entry

“Warn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/warn. Accessed 24 Aug. 2025.

Kids Definition

warn

verb
1
a
: to give notice to beforehand especially of danger or evil
b
: to give advice to : counsel
2
: to order to go or stay away
warned us off their land
warner noun

More from Merriam-Webster on warn

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