(1) The most expensive accommodations on a ship or train or plane
(2) The highest rank in a classification
(3) Mail that includes letters and postcards and packages sealed against inspection
- Belonging to the best or top group in a system of classification.
- That was a first class restaurant.
- Of, or relating to the most luxurious and expensive class of accommodation on a train, ship etc.
- We travelled first class to New York
- Of, or relating to a class of mail to be delivered before second class.
- First class stamps are now more expensive.
- Of, or relating to a first class match.