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warn someone about someone or something

to advise someone about the dangers associated with someone or something. Didn't I warn you about the dangers of going there? I warned you about Alice.
See also: warn

warn someone against someone or something

to advise someone against someone, something, or doing something. We warned them all against going to the region at this time. I warned her against Gerald.
See also: warn

warn someone away from someone or something

to advise someone to avoid someone or something. We warned her away from the danger, but she did not heed our warning. Why didn't you warn me away from Roger?
See also: away, warn

warn someone of something

to advise someone that something bad is likely to happen. I wish you had warned us of what was going to happen. Please warn John of the heavy traffic he may run into.
See also: of, warn

warn someone off

to advise a person to stay away. We placed a guard outside the door to warn people off until the gas leak could be fixed. The guards warned off everyone in the vicinity.
See also: off, warn

warn about

1. To make someone aware of the actual or potential harm, danger, or evil associated with something: I warned the kids about riding their bikes in the street.
2. To make aware in advance of some actual or potential harm, danger, or evil: The report warned about a possible attack.
See also: warn

warn against

To advise someone that something is dangerous or problematic and should be avoided: I warned them against driving without seatbelts. The doctor warns against smoking.
See also: warn

warn away

To notify someone to go or stay away: The guide warned the tourists away from the edge of the cliff. The sign warned away trespassers.
See also: away, warn

warn of

To make someone aware in advance of some actual or potential harm, danger, or evil: The doctor warned them of the flu epidemic. The employees were warned of the company's impending bankruptcy.
See also: of, warn

warn off

To notify someone to go or stay away: The sheriff warned them off the private property.
See also: off, warn
References in periodicals archive ?
The introductory phrase: "if one warns his wife," raises two immediate problems, both of which will occasion subsequent discussion.
Warns said inadequate pricing is just one of investors' many concerns:
Michael Goodwin, "Council Bill Warns on Drinking During Pregnancy, " New York Times, 16 November 1983, LNOS.
Current labeling warns against use of sleep aids and antiemetics by asthma patients.
A fifth finalist sent in a warning label on a small, 1" x 4" LCD panel that warns, "Do not eat the LCD panel.
This information can either be used to warn the driver that he is getting too close, or automatically maintain a safe distance from the vehicle in front.
But now we want to get it out to other schools so they don't have to have a tragedy,'' said Erik Ceja, a senior in WARN.
Configurable Warning Level -- Choose to warn users of either or both "High Risk" and "Low Risk" suspicious sites.
A label on a robotic massage chair which warns, "Do not use massage chair without clothing.
The ALR-56C(V)1 radar warning receiver detects radar-guided weapon systems threats, warns the pilot, and cues appropriate countermeasures.
bulletin warns of defective bearings in Textron Lycoming engines installed in the Cessna 206s built between Aug.
The system warns pilots of impending accidents caused by "controlled flight into terrain," a category of aviation accidents where a pilot unintentionally flies into the ground or water with a fully operational aircraft.
Third place prize went to another Texan who purchased a Holmes Bathroom Heater which warns, "This product is not to be used in bathrooms.
Operating in the K band, the transmitter warns drivers of roadway hazards, including nearby emergency vehicles.
The AmeriGuard system warns operators of obstacles behind their vehicles while backing.