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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 ?
I warn you that you will have defence of a sort - with a risk and at a price that passes all understanding.
I warn you that you will be home-bound - when fares and transport bills kill leisure and lock you up.
Almost twenty years after publication of the initial article defining FAS, a work that set in motion a huge research apparatus, supplied the momentum for a federal crusade to warn women against drinking during pregnancy, and furnished the evidence for forcing alcoholic beverage manufacturers to place warning labels on bottles, Jones and his colleagues found their expertise rejected along with their diagnosis.
As a result, alcoholic beverage manufacturers might have been advised that they could ben efit similarly from a federally imposed duty to warn.
Conlon, "Researcher Warns Against Heavy Drinking By Pregnant Women," UPI, 9 September 1981, LNOS.
Michael Goodwin, "Council Bill Warns on Drinking During Pregnancy, " New York Times, 16 November 1983, LNOS.
Brown characterized comment k as stating a principle of negligence because the manufacturer would be liable "only if it failed to warn of a defect of which it either knew or should have known.
Although Brown's reference to negligence has proved misleading to some, the court clearly was addressing a manufacturer's failure to use reasonable care in discovering a drug's danger, not the separate issue of a manufacturer's decision not to warn of a known or knowable danger.
Whereas a failure to warn claim based on negligence requires proof that
Anderson clarified that the actual or constructive knowledge requirement does not determine "the duty to warn or .
Existing California law, as established in Brown and Anderson, therefore compelled the conclusion in Carlin that a plaintiff could maintain a cause of action in strict liability for failure to warn of known or knowable pharmaceutical risks unless there was a valid policy reason for carving out an exception for drugs.
Justice Joyce Kennard voiced similar concerns in advocating a modified negligence standard for failure to warn of drug risks.
In a second scenario, a boy in a similar situation tells a friend who warns a teacher, helping to stop the confrontation before shots are fired.
Warns said he'd like to see insurers return some of that excess surplus by repurchasing stock or increasing dividends.
Distribution: Companies must develop multichannel distribution; those relying on one channel won't survive, Warns said.