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 发动骚乱,闹事 University students rioted in protest at tuition fees. 大学生闹事,抗议学费过高。
—rioting noun [uncountableU]
—rioter noun [countableC]