The Collaborative International Dictionary of English v.0.48:

Track \Track\, n. [OF. trac track of horses, mules, trace of
   animals; of Teutonic origin; cf.D. trek a drawing, trekken to
   draw, travel, march, MHG. trechen, pret. trach. Cf. Trick.]
   1. A mark left by something that has passed along; as, the
      track, or wake, of a ship; the track of a meteor; the
      track of a sled or a wheel.
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            The bright track of his fiery car.    --Shak.
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   2. A mark or impression left by the foot, either of man or
      beast; trace; vestige; footprint.
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            Far from track of men.                --Milton.
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   3. (Zool.) The entire lower surface of the foot; -- said of
      birds, etc.
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   4. A road; a beaten path.
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            Behold Torquatus the same track pursue. --Dryden.
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   5. Course; way; as, the track of a comet.
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   6. A path or course laid out for a race, for exercise, etc.
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   7. (Railroad) The permanent way; the rails.
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   8. [Perhaps a mistake for tract.] A tract or area, as of
      land. [Obs.] "Small tracks of ground." --Fuller.
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   Track scale, a railway scale. See under Railway.
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