'Sapper' definitions:
Definition of 'sapper'
From: WordNet
noun
A military engineer who lays or detects and disarms mines
noun
A military engineer who does sapping (digging trenches or undermining fortifications)
Definition of 'Sapper'
From: GCIDE
- Sapper \Sap"per\, n. [Cf. F. sapeur.] One who saps; specifically (Mil.), one who is employed in working at saps, building and repairing fortifications, and the like. [1913 Webster]