first class

Adjective

• Belonging to the best or top group in a system of classification.
• Of, or relating to the most luxurious and expensive class of accommodation on a train, ship, hotel, etc.
• Of, or relating to a class of mail to be delivered before second class.
• Great, very enjoyable.
• Of, or relating to a first class match.
• Of, or relating to a treatment like that for a first-class citizen.

Noun

• (A status, section, etc which is of) premier rank.
• the third year of primary school, following after the junior and senior infant levels.
• One of two classes of city government in the U.S. state of Kentucky, in which cities elect a mayor and aldermen.