Source : Webster's Revised Unabridged Dictionary (1913)

File \File\, v. i. [Cf. F. filer.] (Mil.)
   To march in a file or line, as soldiers, not abreast, but one
   after another; -- generally with off.

   {To file with}, to follow closely, as one soldier after
      another in file; to keep pace.

            My endeavors Have ever come too short of my desires,
            Yet filed with my abilities.          --Shak.