insurrection n: the act or an instance of revolting esp. violently against civil or political authority or against an established government
: the crime of inciting or engaging in such revolt [whoever incites, sets on foot, assists, or engages in any rebellion or against the authority of the United States…shall be fined not more than $10,000 or imprisoned not more than ten years "U.S. Code "]
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.