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A worldwide darkening and cooling of the atmosphere with consequent devastation of life forms, believed to be a probable outcome of large-scale nuclear war.
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.
(Environmental Science) a period of extremely low temperatures and little light that, it has been suggested, would occur as a result of a nuclear war
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the worldwide devastation, darkness, and cold that conceivably could result from a nuclear war.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The prolonged period of cold, dark weather likely on a global scale if a large-scale nuclear war produced immense dust clouds shutting out light from the Sun.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||nuclear winter - a long period of darkness and extreme cold that scientists predict would follow a full-scale nuclear war; a layer of dust and smoke in the atmosphere would cover the earth and block the rays of the sun; most living organisms would perish|
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