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The welding of two materials under high pressure or vacuum without the use of heat.
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.
(Metallurgy) (tr) to join (two metal surfaces) without heat by forcing them together so that the oxide films are broken and adhesion occurs
cold welding n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Past participle: cold-welded
Collins English Verb Tables © HarperCollins Publishers 2011