first–class 
/ˈfɚstˈklæs, Brit ˈfə:stˈklɑ:s/ adjective
/ˈfɚstˈklæs, Brit ˈfə:stˈklɑ:s/ adjective 1 : of or relating to first class
▪ passengers in the first-class cabin ▪ raising the rates for first-class mail 2 : of the best quality : of the highest excellence
▪ a first-class telescope/meal ▪ first-class [=excellent, superior] work
▪ passengers in the first-class cabin ▪ raising the rates for first-class mail
▪ a first-class telescope/meal ▪ first-class [=excellent, superior] work
— first–class adverb
▪ They insist on flying first-class. ▪ I'd like to send this package first-class.
▪ They insist on flying first-class. ▪ I'd like to send this package first-class.
