Conpiracy theory definitions

https://en.wikipedia.org/wiki/Conspiracy_theory

A conspiracy theory is an explanatory hypothesis that accuses two or more persons, a group, or an organization of having caused or covered up, through secret planning and deliberate action, an event or situation which is typically taken to be illegal or harmful.

http://dictionary.reference.com/browse/conspiracy-theory

the idea that many important political events or economic and social trends are the products of secret plots that are largely unknown to the general public.

http://community.wikia.com/wiki/File:Just_because_it%27s_a_conspiracy_doesn%27t_mean_it_isn%27t_true_Matthew_Dentith_TEDxChristchurch

Author of ‘The Philosophy of Conspiracy Theories’, Dr Matthew Dentith specialises in the analysis of conspiracy theories whilst also being a keen teacher of critical thinking skills. He also co-hosts ‘The Podcaster’s Guide to the Conspiracy’ and can be heard every Thursday morning at 8.15am for 10 minutes discussing conspiracy theories with Zac on 95bFM’s Breakfast Show.