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English definition of “antithesis”

antithesis

noun [C]     /ænˈtɪθəsɪs/ (plural antitheses /ænˈtɪθəsiːz/) formal
the exact opposite: [usually singular] She is slim and shy - the antithesis of her sister.Opposites
(Definition of antithesis noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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