Definition of "warn" []

To make aware in advance of actual or potential harm, danger, or evil. (verb-transitive)
To admonish as to action or manners. (verb-transitive)
To notify (a person) to go or stay away: warned them off the posted property. (verb-transitive)
To notify or apprise in advance: They called and warned me that they might be delayed. (verb-transitive)
To give a warning. (verb-intransitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "warn" in a sentence

"I again warn my fellow Americans who are use to simply standing by while events pass you by ...."
"One risk of dividend investing, experts warn, is being drawn into mature companies with poor growth prospects."
"One viewpoint which has taken me utterly by warn is the strenuous cry for a Chiefs to breeze an Offensive Tackle in a initial round."

Words like "warn"

advise counsel enjoin inform

order rede say tell

warn off

warned warner warning

warns wern worn