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English definition of “beware”

beware

verb [only in infinitive and imperative] uk   /bɪˈweər/ us    /-ˈwer/
C1 [I or T] used to warn someone to be very careful about something or someone: Beware salespeople who promise offers that seem too good to be true. You should beware of undercooked food when staying in hot countries. Beware of falling asleep while sunbathing.Threats and warnings [I] used on signs to warn people of something dangerous: Beware of the dog. Beware - poisonous chemicals.Threats and warnings
(Definition of beware from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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