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

 

serration

 noun
noun
BrE BrE//seˈreɪʃn//
 
; NAmE NAmE//seˈreɪʃn//
 
 
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a part on an edge or the blade of a knife that is sharp and pointed like a saw
See the Oxford Advanced American Dictionary entry: serration