To make unclean, dirty, or impure; soil; befoul.Figuratively, to sully or tarnish, as reputation, etc.To make ceremonially unclean.To overcome the chastity of; debauch; violate; deflower.To taint, in a moral sense; corrupt; vitiate; debauch; pollute.Synonyms To contaminate, foul, stain, dirty. See taint, v. t.To march off in a line, or by files; file off.In fortification, same as defilade.n. A narrow passage in a mountain region; a gorge through which a body of troops or other persons can pass in a file or narrow line.n. A march by files.n. Synonyms Gorge, Ravine, etc. See valley.