Bedeutung von “first-class” — Learner’s Dictionary

first-class

adjective us uk /ˌfɜːstˈklɑːs/
BEST

relating to the best and most expensive available service, especially when travelling or sending something somewhere:

a first-class ticket
a first-class stamp
VERY GOOD

of very good quality:

It was a first-class restaurant.
first class adverb

How much is it to send / this letter first class?

(Definition von “first-class” aus dem Cambridge Learner's Dictionary © Cambridge University Press)