third class

¹ American  

noun

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

Etymology

Origin of third class¹

First recorded in 1835–45

Origin of third-class²

First recorded in 1830–40

Example Sentences

The Oscar-winning film, directed by James Cameron, saw Kate Winslet play upper class socialite Rose opposite Leonardo DiCaprio's third class passenger Jack Dawson on the doomed ship's maiden voyage.

From BBC • Apr. 27, 2025

“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

And Project Number One returns, with its third class, this time with the stylist and costume designer Hahnji Jang and the lighting designer Kate McGee.

From New York Times • Jun. 21, 2022

Mullane, the three-time space shuttle flier, suggests using astronaut first class, second class, third class, “depending on what your involvement is, whether you pull out a wallet and write a check.”

From Washington Post • May 25, 2021

He proceeded forward, running his hand along the green tarps of the lifeboats, until he met the chain separating steerage from third class.

From "Middlesex: A Novel" by Jeffrey Eugenides