def·i·lade 
(dĕfə-lād′, -läd′)
(dĕfə-lād′, -läd′)tr.v. def·i·lad·ed, def·i·lad·ing, def·i·lades
To arrange (fortifications) in such a way as to give protection from enfilading and other fire.
n.
1. The act or procedure of defilading.
2. A fortified position offering protection from enfilading and other fire.
[DE- + (EN)FILADE.]