tract > define

An extended area of land.
- synonyms: piece of land, piece of ground, parcel of land, parcel
A system of body parts that together serve some particular purpose.
A brief treatise on a subject of interest; published in the form of a booklet.
- synonyms: pamphlet
A bundle of myelinated nerve fibers following a path through the brain.
- synonyms: nerve pathway, nerve tract, pathway

(v.t.) To trace out; to track; also, to draw out; to protact.
(v.) 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.
(v.) Treatment; exposition.
(v.) Continuity or extension of anything; as, the tract of speech.
(n.) A written discourse or dissertation, generally of short extent; a short treatise, especially on practical religion.
(v.) A region or quantity of land or water, of indefinite extent; an area; as, an unexplored tract of sea.
(v.) Continued or protracted duration; length; extent.
(v.) The footprint of a wild beast.
(v.) Track; trace.
(v.) Something drawn out or extended; expanse.
(v.) Traits; features; lineaments.

by Webster's Revised Unabridged Dictionary

tract is an area of land designated for a specified purpose or a specified development.