first-class

If something is first-class, it's the very best. First-class seats on an airplane are the roomiest and most comfortable—and the most expensive.

This adjective is perfect for describing the highest-quality version of something, from first-class stamps that get your letter to its destination faster to a first-class detective who relentlessly follows every single clue until the mystery is solved. First-class orchestras are highly accomplished, and a first-class moving company is unlikely to break your dishes while transporting them to your new house.

Definitions of first-class
  1. adjective
    very good;of the highest quality
    “a first-class mind”
    synonyms: excellent, fantabulous, splendid
    superior
    of high or superior quality or performance
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