Source : Webster's Revised Unabridged Dictionary (1913)

Footprint \Foot"print`\, n.
   The impression of the foot; a trace or footmark; as,
   ``Footprints of the Creator.''

Source : WordNet®

footprint
     n 1: a mark of a foot or shoe on a surface; "the police made
          casts of the footprints in the soft earth outside the
          window" [syn: {footmark}, {step}]
     2: a trace suggesting that something was once present or felt
        or otherwise important; "the footprints of an earlier
        civilization"
     3: the area taken up by some object; "the computer had a
        desktop footprint of 10 by 16 inches"

Source : Free On-Line Dictionary of Computing

footprint
     
        1.  The floor or desk area taken up by a
        piece of hardware.
     
        2.  The amount of {disk} or {RAM} taken up by
        a program or file.
     
        3. ({IBM}) The {audit trail} left by a crashed program (often
        "footprints").
     
        See also {toeprint}.
     
        [{Jargon File}]
     
        (1995-04-25)