n. Part of a group that agree to do an unlawful or unethical act.
the GNU version of the Collaborative International Dictionary of English
n. One who engages in a conspiracy; a plotter.
The Century Dictionary and Cyclopedia
n. One who conspires or engages in a conspiracy or is concerned in a plot; a joint plotter; specifically, one who conspires with others to commit treason.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.