CITIZEN, First-class

Adjective

first class (not comparable)

1. Belonging to the best or top group in a system of classification. quotations ▼That was a first class restaurant.
2. Of, or relating to the most luxurious and expensive class of accommodation on a train, ship, hotel, etc.We travelled first class to New York.
3. Of, or relating to a class of mail to be delivered before second class.First class stamps are now more expensive.
4. (UK, India) Great, very enjoyable.How was the cricket match? It was first class.
5. (cricket) Of, or relating to a first class match.
6. (programming) Of, or relating to a treatment like that for a first-class citizen.Java has no first-class functions, so function objects are usually expressed by an interface with a single method.