definition of
tract

[1] #1 tract n. [piece of land, piece of ground, parcel of land, parcel] an extended area of land. wn

[2] #2 tract n. a system of body parts that together serve some particular purpose. wn

[3] #3 tract n. [pamphlet] a brief treatise on a subject of interest; published in the form of a booklet. wn

[4] #4 tract n. [nerve pathway, nerve tract, pathway] a bundle of myelinated nerve fibers following a path through the brain. wn