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Malicious computer software that interferes with normal computer functions or sends personal data about the user to unauthorized parties over the internet.
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.
(Computer Science) a computer program designed specifically to damage or disrupt a system, such as a virus
[C20: from mal(icious) + (soft)ware]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Software that is intended to damage computer systems.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited