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English definition of “evil”

evil

adjective uk   /ˈiː.vəl/ us  
B2 morally bad, cruel, or very unpleasant: an evil dictator These people are just evil. If the weather or a smell is evil, it is very unpleasant.

evil

noun [C or U] uk   /ˈiː.vəl/ us  
B2 something that is very bad and harmful: Each new leader would blame his predecessor for all the evils of the past. Drug addiction is one of today's great social evils. For the sake of long-term peace, the military option is the lesser evil/the lesser of two evils (= the less unpleasant of two bad choices). the battle between good and evil
(Definition of evil from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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