Source : Webster's Revised Unabridged Dictionary (1913)

Track \Track\, v. t. [imp. & p. p. {tracked}; p. pr. & vb. n.
   {tracking}.]
   To follow the tracks or traces of; to pursue by following the
   marks of the feet; to trace; to trail; as, to track a deer in
   the snow.

         It was often found impossible to track the robbers to
         their retreats among the hills and morasses.
                                                  --Macaulay.

   2. (Naut.) To draw along continuously, as a vessel, by a
      line, men or animals on shore being the motive power; to
      tow.

Source : WordNet®

tracking
     n : the pursuit (of a person or animal) by following tracks or
         marks they left behind [syn: {trailing}]

Source : Free On-Line Dictionary of Computing

tracking
     
         The spacing between {characters} in a line of {text}.
        This is defined when a {font} is designed but can often be
        altered in order to change the appearance of the text or for
        special effects.
     
        Tracking should not be confused with {kerning} which deals
        with the spacing between certain pairs of characters.
     
        See also {leading}.
     
        (1996-06-07)