The Collaborative International Dictionary of English v.0.48:

Escarp \Es*carp"\, v. t. [imp. & p. p. Escarped; p. pr. & vb.
   n. Escarping.] (Mil.)
   To make into, or furnish with, a steep slope, like that of a
   scrap. --Carleton.
   [1913 Webster]