defilev. i.[F. dfiler; pref. d-, for des- (L. dis-) + file a row or line. See File a row.] To march off in a line, file by file; to file off.()v. t. (Mil.) Same as Defilade.()n.[Cf. F. dfil, fr. dfiler to defile.]1. Any narrow passage or gorge in which troops can march only in a file, or with a narrow front; a long, narrow pass between hills, rocks, etc.()2. (Mil.) The act of defilading a fortress, or of raising the exterior works in order to protect the interior. See Defilade.()v. t.[OE. defoulen, -foilen, to tread down, OF. defouler; de- + fouler to trample (see Full, v. t.), and OE. defoulen to foul (influenced in form by the older verb defoilen). See File to defile, Foul, Defoul.]1. To make foul or impure; to make filthy; to dirty; to befoul; to pollute.()They that touch pitch will be defiled. (Shak.)2. To soil or sully; to tarnish, as reputation; to taint.()He is . . . among the greatest prelates of this age, however his character may be defiled by . . . dirty hands. (Swift.)3. To injure in purity of character; to corrupt.()Defile not yourselves with the idols of Egypt. (Ezek. xx. 7.)4. To corrupt the chastity of; to debauch; to violate; to rape.()The husband murder'd and the wife defiled. (Prior.)5. To make ceremonially unclean; to pollute.()That which dieth of itself, or is torn with beasts, he shall not eat to defile therewith. (Lev. xxii. 8.)