beware of

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beware of (someone or something)

Be cautious or mindful of something or someone, especially something or someone that might pose a danger of some kind. Beware of the boss today—he's been yelling at everyone he sees. Beware of their dog, he's vicious!
See also: beware, of

beware of someone or something

to be cautious and watchful about someone or something. Beware of Ted. He's acting irrational. You should beware of the dog.
See also: beware, of
References in classic literature ?
Bitter were the tears she shed, while her husband sought in vain to soothe her with words of comfort and counsel, warning her, above all things, never to leave the castle, to hold no intercourse with strangers, to beware of evil counsellors, and especially to be on her guard against strange women.
His foot once within the asylum, the criminal was sacred; but he must beware of leaving it; one step outside the sanctuary, and he fell back into the flood.
BEWARE of parking at the Acre Mill annex to the Huddersfield Infirmary.
Global Banking News-October 17, 2014--Bank of Japan asks commercial banks to beware of global markets
Beware of stifling the watchdog CONGRATULATIONS on Ivor Jay's column headed 'Beware the watchdog.
Entitled Beware of Images, it is a feature-length, animated documentary about the history of visual representation.
Beware of Limbo Dancers: A Correspondent's Adventures with the New York Times provides a witty memoir from a native Arkansan who became a reporter for the Times, and covers his newspaper career and evolution.
ROP called upon all drivers to adhere to traffic rules and systems, beware while using the road, observe the speed limit, not overtake in forbidden areas and beware of road surprises to limit traffic accidents.
PETER MacDONALD last night warned title-chasing Rangers to beware of the pot-holed Perth pitch.
The IRS is warning senior citizens and other taxpayers to beware of an emerging scheme tempting them to file tax returns claiming fraudulent refunds.
BEWARE AT TOLL BAR If, by chance, you intend driving your car Via that notorious island at Toll Bar, Beware of the drivers around you, For they are quite likely to surround you, Because no one seems to know where they are.
Beware Greeks bearing gifts should now read beware of bankers bearing collateral debt obligations.
Anyone who thinks conscientious printers should defy the courts, by refusing to print letterheads for the Archives, the Toronto Leather/SM/Fetish Coming Out Group, or any other gay rights organization should beware of saying so in print.
Beware of any training that requires travel to warm climates in winter months.
Beware of products whose idea of "easy" reporting involves a PC and/or other equipment that are not part of the key control product itself.