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



BrE BrE//ˈsæpə(r)//
; NAmE NAmE//ˈsæpər//
(British English) The army
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a soldier whose job is to build or repair roads, bridges, etc. See related entries: The army Word Origin early 17th cent.: from the verb sap ‘dig a sap (in the sense tunnel or trench)’ + -er.