• (n.) The protection of the interior walls of a fortification from an enfilading fire, as by covering them, or by a high parapet on the exposed side. • (n.) The act of defiling, or state of being defiled, whether physically or morally; pollution; foulness; dirtiness; uncleanness. Found on http://thinkexist.com/dictionary/meaning/defilement/
De·file'ment noun [ Confer French défilement . See Defile ] (Mil.) The protection of the interior walls of a fortification from an enfilading fire, as by covering them, or by a high parapet on the exposed side. Found on http://www.encyclo.co.uk/webster/D/23