ri·ot 1 n: a disturbance of the peace created by an assemblage of usu. three or more people acting with a common purpose and in a violent and tumultuous manner to the terror of the public; also: the crime of rioting
riot 2 vi: to create or engage in a riot
ri·ot·er n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.