first class

Definitions of first class
  1. noun
    mail that includes letters and postcards and packages sealed against inspection
    synonyms: 1st class, 1st-class mail, first-class mail
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    types:
    correspondence
    communication by the exchange of letters
    card
    a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures)
    type of:
    mail
    the bags of letters and packages that are transported by the postal service
  2. noun
    the most expensive accommodations on a ship or train or plane
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    type of:
    accommodation
    living quarters provided for public convenience
  3. adverb
    by first class conveyance; with first class accommodations
    “we always travel first class
  4. noun
    the highest rank in a classification
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    type of:
    high quality, superiority
    the quality of being superior
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