Third World

American  

noun

(sometimes lowercase)

1. the underdeveloped nations of the world, especially those with widespread poverty.

2. the group of developing nations, especially of Asia and Africa, that do not align themselves with the policies of either the U.S. or the former Soviet Union.

3. the minority groups within a nation or predominant culture.

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Third World British  

noun

1. Also called: developing world.  the less economically advanced countries of Africa, Asia, and Latin America collectively, esp when viewed as underdeveloped and as neutral in the East-West alignment

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Third World Cultural  

1. The nonaligned nations — which are often developing nations — of Africa, Asia, and Latin America. They are in a “third” group of nations because they were allied neither with the United States nor with the former Soviet Union.

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third world Idioms  

1. Underdeveloped or developing countries, as in The conditions in our poorest rural areas resemble those in the third world. This expression originated in the mid-1900s, at first denoting those countries in Asia and Africa that were not aligned with either the Communist bloc nations or the non-Communist Western nations. Because they were for the most part poor and underdeveloped, the term was transferred to all countries with those characteristics, and later still to poorer groups within a larger prevailing culture.

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Compare meaning

How does third-world compare to similar and commonly confused words? Explore the most common comparisons:

• First World vs. Third World

Example Sentences

Ehrlich urged wealthy nations to cut off food assistance to the Third World.

From The Wall Street Journal • Mar. 17, 2026

In fact, on a midnight shift in Cheyenne Mountain, I even read Tom Clancy’s “Red Storm Rising,” which envisioned the Cold War gone hot, a Third World War gone nuclear.

From Salon • Dec. 7, 2025

She showed a “Wall Column” made of four cast cement sections in “Dialectics of Isolation: An Exhibition of Third World Women Artists of the United States,” at A.I.R.

From New York Times • Jul. 29, 2023

“You have a luxury community with world-class golf courses and amazing views of the ocean, but some homeowners are literally living in Third World conditions.”

From Los Angeles Times • Mar. 6, 2023

“Well, I don’t see how you can go to the Third World if there is no Third World,” his father said.

From "Healer of the Water Monster" by Brian Young