/def'euh layd"/ , n. , v. , defiladed, defilading .
n.
1. protection or shielding from hostile ground observation and flat projecting fire provided by an artificial or natural obstacle, as a hill.
v.t.
2. to shield from enemy fire by using natural or artificial obstacles.
[ 1820-30; défil ( er ), orig. to unthread (equiv. to dé- DIS- 1 + ( en ) filer to thread filum thread) + F -ade -ADE 1 ]