Definition of "conspiracy theory" []

• A theory seeking to explain a disputed case or matter as a plot by a secret group or alliance rather than an individual or isolated act. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "One of Ammerman's former prominent chaplains, James Linzey, could be heard in 2005 and espousing an anti-semitic, white racialist conspiracy theory alleging an evil Jewish banker-controlled plot to send a wave of Mexican and Islamic killers into the American Southwest to alter America's racial and ethnic makeup by raping all women and killing all adult and teen males."
• "In San Francisco, these right-on women actually add this to the bottom of the various flyers they pass out announcing the newest gathering of conspiracy theory speech events; “THIS IS A FRAGRANCE-FREE EVENT.”"