I. de ‧ file 1 /dɪˈfaɪl/ BrE AmE verb [transitive] formal
[ Date: 1300-1400 ; Origin: defoul 'to crush with the feet, make dirty' (13-17 centuries) , from Old French defouler , from fouler 'to step on' ]
to make something less pure and good, especially by showing no respect:
Hallam’s tomb had been defiled and looted.
II. de ‧ file 2 /dɪˈfaɪl, ˈdiːfaɪl/ BrE AmE noun [countable] formal
a narrow passage, especially through mountains