Walled side of a ditch

• Ditch wall
• A steep artificial slope in front of a fortification
• Protective embankment
• Wall of a moat
• Steep descent
• Inner wall of a trench

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"steep slope," especially as part of a fortification, 1680s, from French escarpe (16c.), from Italian scarpa (see scarp ).

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Escarp \Es*carp"\, n. [F. escarpe (cf. Sp. escarpa, It. scarpa), fr. escarper to cut steep, cut to a slope, prob. of German origin: cf. G. scharf sharp,, E. sharp, or perh. scrape.] (Fort.) The side of the ditch next the parapet; -- same as scarp , and ...

Wiktionary Word definitions in Wiktionary
n. The side of the ditch next to the parapet in a fortification; the scarp. vb. (context transitive English) To make into, or furnish with, a steep slope, like that of a scarp.