v. t. [ imp. & p. p. Defiladed; p. pr. & vb. n. Defilading. ] [ Cf. F. défiler to defile, and défilade act of defiling. See 1st Defile. ] (Mil.) To raise, as a rampart, so as to shelter interior works commanded from some higher point. [ 1913 Webster ]

n. (Mil.) The art or act of determining the directions and heights of the lines of rampart with reference to the protection of the interior from exposure to an enemy's fire from any point within range, or from any works which may be erected. Farrow. [ 1913 Webster ]