first-class
AdjectiveUS[furst-klas]/ˌfɝstˈklæs/2 syllables
Open English WordNet
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Webster's Dictionary (1913)
first′-class′ (fẽrst′klăs′), adjective
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.
Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54