Definition of overkill noun from the Oxford Advanced American Dictionary

 

overkill

 noun
noun
NAmE//ˈoʊvərˌkɪl//
 
[uncountable](disapproving)
 
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too much of something that reduces the effect it has There is a danger of overkill if you plan everything too carefully.
See the Oxford Advanced Learner's Dictionary entry: overkill