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Related to counterforce: ADT
A contrary or opposing force, especially a military force capable of destroying the nuclear armaments of an enemy.
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.
(General Physics) a force that acts in opposition to another force
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
coun•ter•force(ˈkaʊn tərˌfɔrs, -ˌfoʊrs)
a contrary or opposing force, tendency, etc.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The employment of strategic air and missile forces in an effort to destroy, or render impotent, selected military capabilities of an enemy force under any of the circumstances by which hostilities may be initiated.
Dictionary of Military and Associated Terms. US Department of Defense 2005.