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English definition of “mischief”

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mischief

noun uk   /ˈmɪs.tʃɪf/ us  
[U] behaviour, especially a child's, that is slightly bad but is not intended to cause serious harm or damage: She's a lively little girl, full of mischief. He needs a hobby to keep him busy and stop him from getting into mischief. Maybe a new bike would keep him out of mischief. I hope you haven't been up to any mischief while I was gone. [U] informal damage or harm: criminal mischief
(Definition of mischief from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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