1. (v. i.) To march off in a line, file by file; to file off.

2. (v. t.) Same as Defilade.

3. (n.) 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.

4. (n.) The act of defilading a fortress, or of raising the exterior works in order to protect the interior. See Defilade.

5. (v. t.) To make foul or impure; to make filthy; to dirty; to befoul; to pollute.

6. (v. t.) To soil or sully; to tarnish, as reputation; to taint.

7. (v. t.) To injure in purity of character; to corrupt.

8. (v. t.) To corrupt the chastity of; to debauch; to violate.

9. (v. t.) To make ceremonially unclean; to pollute.

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