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first–class

first–class /ˈfɚstˈklæs/ Brit /ˈfəːstˈklɑːs/ adjective
first–class
/ˈfɚstˈklæs/ Brit /ˈfəːstˈklɑːs/
adjective
Britannica Dictionary definition of FIRST–CLASS
: of or relating to first class
: of the best quality : of the highest excellence

— first–class

adverb