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

 

prowler

 noun
noun
BrE BrE//ˈpraʊlə(r)//
 
; NAmE NAmE//ˈpraʊlər//
 
 
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a person who follows somebody or who moves around quietly outside their house, especially at night, in order to frighten them, harm them or steal something from them
See the Oxford Advanced American Dictionary entry: prowler