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Fourth Worldalso fourth world
1. The least-developed and poorest nations of the Third World, especially those in Africa and Asia that lack mineral wealth.
2. The collection of peoples, especially ethnic and religious minorities, that lack widespread recognition as nations or are subject to economic or political discrimination.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Economics) the poorest countries in the most undeveloped parts of the world in Africa, Asia, and Latin America
2. (Economics) the poorest people in developed countries
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the world's poorest and least developed nations, esp. in Africa and Asia.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.