What is "rasante"

Rasante \Ra`sante"\ (r[.a]`z[aum]Nt"), a. [F., p. pr. of raser to graze.] (Fort.) Sweeping; grazing; -- applied to a style of fortification in which the command of the works over each other, and over the country, is kept very low, in order that the shot may more effectually sweep or graze the ground before them.
--H. L. Scott.

a. (context military historical English) sweep; graze; applied to a style of fortification in which the command of the works over each other, and over the country, is kept very low, so that the shot may more effectually sweep or graze the ground before them.