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English definition of “antithesis”

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antithesis

noun [C] uk   /ænˈtɪθ.ə.sɪs/ ( plural antitheses   /-siːz/   ) us  
the exact opposite: She is slim and shy - the very antithesis of her sister. He is the exact antithesis of what I find attractive in men. a contrast between two things: Thanks to the collapse of communism the political antithesis between Left and Right is less important.
antithetical
adjective uk   /ˌæn.tɪˈθet.ɪ.kəl/ us    /-t̬ɪˈθet̬-/ ( also antithetic ) formal
antithetical views
(Definition of antithesis from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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