Definition of rioter noun from the Oxford Advanced Learner's Dictionary

 

rioter

 noun
noun
BrE BrE//ˈraɪətə(r)//
 
; NAmE NAmE//ˈraɪətər//
 
 
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one of a group of people who behave in a violent way in a public place, often as a protest Rioters set fire to parked cars.