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Definition of First-class
1. Adjective. Very good;of the highest quality. "A first-class mind"
Exact synonyms: Excellent, Fantabulous, Splendid
Similar to: Superior
Derivative terms: Excel, Excellence, Excellency
Similar to: Superior
Derivative terms: Excel, Excellence, Excellency
Medical Definition of First-class
1. Of the best class; of the highest rank; in the first division; of the best quality; first-rate; as, a first-class telescope. 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. Source: Websters Dictionary (01 Mar 1998)