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An associate or accomplice, especially in crime.
[Middle English, from Old French, from Late Latin complex, complic-, one closely connected with : Latin com-, com- + Latin plicāre, to fold; see plek- in Indo-European roots.]
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.
obsolete an associate or accomplice
[C15: from Old French, from Late Latin complex partner, associate, from Latin complicāre to fold together; see complicate]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
an accomplice or associate.
[1425–75; late Middle English < Middle French < Late Latin complice-, oblique s. of complex confederate (formation modeled on simplex simplex) =com- com- + -plex -fold]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.