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third-class definition

third·-class (t̸hʉrd′klas′)

adjective

  1. of the class, rank, excellence, etc. next below the second
  2. designating or of accommodations next below the second class
  3. ☆ designating or of a lower-cost class of mail limited to merchandise weighing less than 16 oz or bulk mailing of identical circulars, bulletins, advertisements, etc.

adverb

  1. with accommodations next below the second class to travel third-class
  2. ☆ as or by third-class mail

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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