protection or shielding from hostile ground observation and flat projecting fire provided by an artificial or natural obstacle, as a hill.
verb (used with object), defiladed, defilading.
to shield from enemy fire by using natural or artificial obstacles.
< French défil
), orig. to unthread (equivalent to dé- dis-1
to thread ≪ Latin fīlum
thread) + French -ade -ade1