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switched on

adjective
 
 
/ˌswɪtʃtˈɒn/ US  /-ˈɑːn/ old-fashioned informal

Definition

quick to know about or be involved with the most recent fashions and ideasModern and fashionableFashionModern and fashionable
(Definition of switched on adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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