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English definition of “jet lag”

jet lag

noun [U]    
the feeling of tiredness and confusion that people experience after making a long journey in an aircraft to a place where the time is different from the place they left : Every time I fly to the States , I get really bad jet lag .Tired and making tiredTravelling jet-lagged     /ˈdʒet.læɡd/ adjective Tired and making tiredTravelling
(Definition of jet lag noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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