Webster's Revised Unabridged Dictionary · 1913

Defile

Defile (de*fīl") , intransitive verb

[French défiler; pref. dé-, for des- (Latin dis-) + file a row or line. See File a row.]

To march off in a line, file by file; to file off.

Defile , transitive verb

(Military) Same as Defilade.

Defile (de*fīl" or dē"fīl; 277) , noun

[Compare French défilé, from défiler 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.
(Military) The act of defilading a fortress, or of raising the exterior works in order to protect the interior. See Defilade.

Defile (de*fīl") , transitive verb

[Old English defoulen, -foilen, to tread down, Old French defouler; de- + fouler to trample (see Full, transitive verb), and Old English 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. — Shakespeare
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