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English definition of “vicious”

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vicious

adjective uk   /ˈvɪʃ.əs/ us  
C2 Viscious people or actions show an intention or wish to hurt someone or something very badly: a vicious thug a vicious dog The police said that this was one of the most vicious attacks they'd ever seen. He gave her a vicious look.C2 used to describe an object, condition, or remark that causes great physical or emotional pain: a large collection of vicious medieval torture instruments I've got a vicious headache. Make sure you wrap up warmly - there's a vicious (= extremely strong and unpleasant) wind out there. a vicious lie/accusation/rumour
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viciously
adverb uk   /-li/ us  
viciousness
noun [U] uk   /-nəs/ us  
(Definition of vicious from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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