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English definition of “controller”

controller

noun [C] uk   /kənˈtrəʊ.lər/ us    /-ˈtroʊ.lɚ/
a person who controls something, or someone who is responsible for what a particular organization does: an air-traffic controller That was the year he became Controller of Radio 4.
(Definition of controller from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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