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English definition of “bad”

bad

adjective (EVIL)    /bæd/ (worse, worst)
B1 (of people or actions) evil or morally unacceptable: There are a lot of bad people in the world. He's got his faults but he's not a bad person.Morally wrong and evilDishonest badness     /ˈbæd.nəs/ noun [U] the quality of being evil or morally unacceptable: There is goodness and badness in everyone.Morally wrong and evilDishonest
(Definition of bad adjective (EVIL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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