RIOTOUS Meaning of RIOTOUS in English [ri.ot.ous] adj (15c) 1 a: of the nature of a riot: turbulent b: participating in riot 2: abundant, exuberant "the garden was ~ with flowers" -- ri.ot.ous.ly adv -- ri.ot.ous.ness n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012