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English definition of “first class”

first class

adjective (MOST EXPENSIVE) (also first-class)    
relating to the most expensive and highest quality service on a plane or train, or in a hotel: a first-class ticket first-class accommodation/travelTravelling UK relating to the most expensive and fastest service for sending post: first-class mail/postage How much is a first-class stamp?The postal system
(Definition of first class adjective (MOST EXPENSIVE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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