Meaning of “the Third World” in the English Dictionary

british dictionary

"Third World" in American English

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Third Worldnoun [ U ]

us /ˈθɜrd ˈwɜrld/

world history the countries in the world whose economies are least developed

(Definition of “Third World” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"Third World" in Business English

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Third Worldnoun [ S ]

uk us old-fashioned ECONOMICS

a name for the poorer countries of the world, for example some of those in Africa, South America, and Asia, that have less developed industry than other countries, and in which many people are poor:

The term "Developing World" is now considered to be more acceptable than "Third World".
The bank has long sought to foster growth in the Third World by financing state-owned industries.
Third World countries/economies/farmers
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(Definition of “Third World” from the Cambridge Business English Dictionary © Cambridge University Press)