first-class /(fẽrst"klăs`)/

first·-class

first-class

a.
  1. Of the best class; of the highest rank; in the first division; of the best quality; first-rate; as, a first-class telescope.

Phrases & Compounds
First-class car
any passenger car of the highest regular class, and intended for passengers who pay the highest regular rate; -- distinguished from a second-class car.