Definition of: defilade

(def′ə·lād′) v.t. ·lad·ed, lad·ing
To plan or construct so as to protect from enfilading and from reverse fire: said of a fortification. [<noun]
—noun
1. The act of defilading.
2. The protection afforded by natural cover or object, or other shield against enemy fire or observation: also de·file′ment. [<F défilade <défiler unthread <dé- away (<L dis-) + fil thread <L filum]