Rĭ'ot-oŭs, a.

a. [O. Fr. rioteux, Pr. riotos, It. riot-toso.] 1. Involving or engaging in riot; wanton; unrestrained; luxurious. The younger son gathered all together, and took his journey into a far country, and there wasted his substance with riotous living. Luke xv. 13. 2. Partaking of the nature of an unlawful assembly; seditious.