Definition of Stanley knife™ noun from the Oxford Advanced Learner's Dictionary

 

Stanley knife™

 noun
noun
BrE BrE//ˈstænli naɪf//
 
; NAmE NAmE//ˈstænli naɪf//
 
(British English)
 
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a very sharp knife with a blade in the shape of a triangle that can be replaced Word Origin late 19th cent.: named after the manufacturer, The Stanley Rule and Level Company (now The Stanley Works).