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

 

vigilantism

 noun
noun
BrE BrE//ˌvɪdʒɪˈlæntɪzəm//
 
; NAmE NAmE//ˌvɪdʒɪˈlæntɪzəm//
 
[uncountable](sometimes disapproving)
 
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the activity of being a vigilante; the practice of having vigilantes in a place