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English definition of “mastermind”

mastermind

verb [T]     /ˈmɑːstəmaɪnd/
to plan every detail of a complicated event or activity and make sure that it happens: He allegedly masterminded both bomb attacks in the region.Planning, expecting and arrangingPlotting and trapping
mastermind noun [C] It is thought he was the mastermind behind (= the person who planned) last year's bombing campaign.
(Definition of mastermind verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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