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• third class
  third class

  noun

  the class, grade, or rank immediately below the second.
• third-class
  third-class

  adjective

  of the lowest or poorest class or quality; inferior.

third class

¹ American  

noun

third classes plural

1. the class, grade, or rank immediately below the second.

2. the least costly class of accommodations on trains, in hotels, etc.

3. (in the U.S. Postal Service) the class of mail consisting of merchandise weighing up to 16 ounces, and written or printed material, as books, manuscripts, or circulars, not sealed against postal inspection.

4. the lowest of three honors degrees conferred by a British university.

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third-class ² American  

[thurd-klas, -klahs] / ˈθɜrdˈklæs, -ˈklɑs /

adjective

1. of the lowest or poorest class or quality; inferior.

2. least costly and luxurious.

   a third-class coach.

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adverb

1. by third-class mail or passenger accommodations.

   to travel third-class.

third class British  

noun

1. the class or grade next in value, quality, etc, to the second

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adjective

1. of the class or grade next in value, quality, etc, to the second

2. of or denoting the class of accommodation in a hotel, on a ship, etc, next in quality and price to the second: usually the cheapest

3. (in the US and Canada) of or relating to a class of mail consisting largely of unsealed printed matter

4. See third

adverb

1. by third-class mail, transport, etc

Other Word Forms

Noun Inflected Forms

• third classes
  plural

Etymology

Origin of third class¹

First recorded in 1835–45

Origin of third-class²

First recorded in 1830–40

Example Sentences

But on Thursday, officials announced that they had used advanced forensic technology to identify one of them as David Walker, a 19-year-old mess attendant third class from Norfolk, Va.

From New York Times • Mar. 29, 2024

First, second and third class travel was provided for conformists, and another section with the same classes for non-conformists.

From BBC • Sep. 17, 2023

Military records showed he served as an airman third class and did student training both in Illinois and Pensacola, Fla., before being discharged in January the following year.

From Washington Post • Dec. 25, 2022

“Some people had it ranked as the third class in the country and I think it’s showing,” Oats said.

From Seattle Times • Nov. 7, 2022

During the summer of 1935, John cadged a small grant from the Macy Foundation to travel third class to Berkeley, and presented himself and his mice at the Rad Lab.

From "Big Science" by Michael Hiltzik