Bedeutung von “mastermind” — Learner’s Dictionary

mastermind

verb [ T ] us uk /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.
mastermind noun [ C ]

It is thought he was the mastermind behind (= the person who planned) last year's bombing campaign.

(Definition von “mastermind” aus dem Cambridge Learner's Dictionary © Cambridge University Press)