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

 

chamfer

 noun
noun
BrE BrE//ˈtʃæmfə(r)//
 
; NAmE NAmE//ˈtʃæmfər//
 
(specialist)
 
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a cut made along an edge or on a corner so that it slopes rather than being at 90° Word Origin mid 16th cent. (in the sense ‘flute or furrow’): back-formation from chamfering, from French chamfrain, from chant ‘edge’ (see the verb cant) + fraint ‘broken’ (from Old French fraindre ‘break’, from Latin frangere).
See the Oxford Advanced American Dictionary entry: chamfer