The Collaborative International Dictionary of English v.0.48:

Tract \Tract\, n. [Abbrev.fr. tractate.]
   A written discourse or dissertation, generally of short
   extent; a short treatise, especially on practical religion.
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         The church clergy at that time writ the best collection
         of tracts against popery that ever appeared. --Swift.
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   Tracts for the Times. See Tractarian.
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The Collaborative International Dictionary of English v.0.48:

Tract \Tract\, n. [L. tractus a drawing, train, track, course,
   tract of land, from trahere tractum, to draw. Senses 4 and 5
   are perhaps due to confusion with track. See Trace,v., and
   cf. Tratt.]
   1. Something drawn out or extended; expanse. "The deep tract
      of hell." --Milton.
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   2. A region or quantity of land or water, of indefinite
      extent; an area; as, an unexplored tract of sea.
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            A very high mountain joined to the mainland by a
            narrow tract of earth.                --Addison.
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   3. Traits; features; lineaments. [Obs.]
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            The discovery of a man's self by the tracts of his
            countenance is a great weakness.      --Bacon.
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   4. The footprint of a wild beast. [Obs.] --Dryden.
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   5. Track; trace. [Obs.]
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            Efface all tract of its traduction.   --Sir T.
                                                  Browne.
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            But flies an eagle flight, bold, and forthon,
            Leaving no tract behind.              --Shak.
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   6. Treatment; exposition. [Obs.] --Shak.
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   7. Continuity or extension of anything; as, the tract of
      speech. [Obs.] --Older.
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   8. Continued or protracted duration; length; extent.
      "Improved by tract of time." --Milton.
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   9. (R. C. Ch.) Verses of Scripture sung at Mass, instead of
      the Alleluia, from Septuagesima Sunday till the Saturday
      befor Easter; -- so called because sung tractim, or
      without a break, by one voice, instead of by many as in
      the antiphons.
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   Syn: Region; district; quarter; essay; treatise;
        dissertation.
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The Collaborative International Dictionary of English v.0.48:

Tract \Tract\, v. t.
   To trace out; to track; also, to draw out; to protact. [Obs.]
   --Spenser. --B. Jonson.
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WordNet (r) 3.0 (2006):

tract
    n 1: an extended area of land [syn: tract, piece of land,
         piece of ground, parcel of land, parcel]
    2: a system of body parts that together serve some particular
       purpose
    3: a brief treatise on a subject of interest; published in the
       form of a booklet [syn: tract, pamphlet]
    4: a bundle of myelinated nerve fibers following a path through
       the brain [syn: nerve pathway, tract, nerve tract,
       pathway]