society > armed hostility > defence > defensive work(s) > earthwork or rampart > [noun] > outwork > other outworks (4)
a type of detached earthwork (see sconce, n.3 1).
Fortification. A simple fieldwork, having two faces which form a salient angle, and normally open at the rear. Also in extended use.
Applied to things shaped like a horseshoe, or a circular arc larger than a semi-circle. Fortification. (See quot. 1704.)
Fortification. A work larger than a redan, consisting of two faces, and two flanks (G. E. Voyle Mil. Dict.).