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Of, relating to, or constituting a nuclear-weapons force able to withstand nuclear attack and therefore capable of delivering a retaliatory attack.
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. (Military) (of a nuclear weapon) intended to be used in a counterattack in response to a nuclear attack
2. (Military) (of a strategy) based on the concept of surviving an initial nuclear attack with enough nuclear weaponry to retaliate
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014