- a soldier employed in the construction of fortifications, trenches, or tunnels that approach or undermine enemy positions.
- a soldier who digs trenches
- (in the British Army) a private of the Royal Engineers
- real name Herman Cyril McNeile . 1888–1937, British novelist, author of the popular thriller Bull-dog Drummond (1920) and its sequels
n.1620s, in a military context, “soldier employed in building fortifications,” agent noun from sap (v.1).