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English definition of “guilty”

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guilty

adjective uk   /ˈɡɪl.ti/ us    /-t̬i/

guilty adjective (FEELING)

B1 feeling guilt: I feel so guilty about forgetting her birthday. She must have done something wrong, because she's looking so guilty. You've got a guilty conscience - that's why you can't sleep.
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guilty adjective (RESPONSIBLE)

B2 responsible for breaking a law: The jury has to decide whether a person is guilty or innocent of a crime. A person accused of a crime is presumed innocent until proven guilty. The company pleaded guilty (= they formally admitted their guilt in court) to the charge of manslaughter. the guilty party the person who has done something wrong or who has committed a crime
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guiltily
adverb uk   /-tɪ.li/ us    /-t̬ɪ.li/
"I don't know where your money is!" she exclaimed guiltily.
guiltiness
noun [U] uk   /-nəs/ us  
(Definition of guilty from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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