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A bot that mimics human conversation, either surreptitiously as for the purpose of phishing, or openly as in an automated customer-service capacity.
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 in the form of a virtual e-mail correspondent that can reply to messages from computer users
[C20: from chat1 + (ro)bot]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014