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

 

perpetrator

 noun
noun
BrE BrE//ˈpɜːpətreɪtə(r)//
 
; NAmE NAmE//ˈpɜːrpətreɪtər//
 
(also North American English, informal perp)
 
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a person who commits a crime or does something that is wrong or evil the perpetrators of the crime We will do everything in our power to bring the perpetrators to justice.
See the Oxford Advanced American Dictionary entry: perpetrator