Definition of class adjective from the Oxford Advanced Learner's Dictionary

 

class

 adjective
adjective
BrE BrE//klɑːs//
 
; NAmE NAmE//klæs//
 
 
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[only before noun] (informal) very good a class player/performer She's a real class act. Word Origin mid 16th cent. (in sense (1)): from Latin classis ‘a division of the Roman people, a grade, or a class of pupils’.
See the Oxford Advanced American Dictionary entry: class