'First-class' definitions:

Definition of 'first-class'

(from WordNet)
adjective
Very good;of the highest quality; "made an excellent speech"; "the school has excellent teachers"; "a first- class mind" [syn: excellent, first-class, fantabulous, splendid]

Definition of 'First-class'

From: GCIDE
  • First-class \First"-class`\, a. Of the best class; of the highest rank; in the first division; of the best quality; first-rate; as, a first-class telescope. [1913 Webster]
  • First-class car or First-class railway carriage, any passenger car of the highest regular class, and intended for passengers who pay the highest regular rate; -- distinguished from a second-class car. [1913 Webster]