third world

noun

variants often Third World
1
: the aggregate of the underdeveloped nations of the world
2
: a group of nations especially in Africa and Asia not aligned with either the Communist or the noncommunist blocs
3
: an aggregate of minority groups within a larger predominant culture
third worlder noun
often Third Worlder

Word History

First Known Use

1958, in the meaning defined at sense 2

Time Traveler
The first known use of third world was in 1958

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Cite this Entry

“Third world.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/third%20world. Accessed 3 Feb. 2026.

Kids Definition

third world

noun
often capitalized T&W
: the poor and underdeveloped nations of the world
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