footprint in WordNet English dictionary

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"
   footprint  footmark  step 
   
2. the area taken up by some object
   "the computer had a desktop footprint of 10 by 16 inches"
   footprint 
   
3. a trace suggesting that something was once present or felt or otherwise important
   "the footprints of an earlier civilization"
   footprint