the world's most poverty-stricken nations, especially in Africa and Asia, marked by very low GNP per capita and great dependence upon foreign economic aid.
Origin of Fourth World
First recorded in 1970–75
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British Dictionary definitions for fourth world
the poorest countries in the most undeveloped parts of the world in Africa, Asia, and Latin America
the poorest people in developed countries
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012