riot2 verb [intransitiveI]VIOLENTif a crowd of people riot, they behave in a violent and uncontrolled way, for example by fighting the police and damaging cars or buildings 發動騷亂,鬧事University students rioted in protest at tuition fees. 大學生鬧事,抗議學費過高。
—rioting noun [uncountableU]
—rioter noun [countableC]