first class

/ˌˈfʌrst ˌklæs/

/fəst klɑs/

Other forms: first classes

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

   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
   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
   type of:

   high quality, superiority

   the quality of being superior