riotous assemblyglossary / riotous assembly Hist. An unlawful assemblage of 12 or more persons causing a disturbance of the peace. See RIOT. [Cases: Riot 1. C.J.S. Riot; Insurrection §§ 2–10.] 词条贡献者 双语律师李明,国际知名法学院法律专业,擅长翻译各类与政府监管相关的法律文件。