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English definition of “QED”

QED

    /ˌkjuː.iːˈdiː/
abbreviation for the Latin phrase 'quod erat demonstrandum': written or said after an argument to show that you have proved something that you wanted to proveCalculations and calculatingAddition, subtraction, multiplication and divisionLogic and reason
(Definition of QED from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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