Definition of unprovoked adjective from the Oxford Advanced Learner's Dictionary

 

unprovoked

 adjective
adjective
BrE BrE//ˌʌnprəˈvəʊkt//
 
; NAmE NAmE//ˌʌnprəˈvoʊkt//
 
 
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(especially of an attack) not caused by anything the person being attacked has said or done an act of unprovoked aggression Her angry outburst was totally unprovoked. see also provoke
See the Oxford Advanced American Dictionary entry: unprovoked