Definition of "tract" []

• An expanse of land or water. (noun)
• A specified or limited area of land: developing a 30-acre tract. (noun)
• Anatomy A system of organs and tissues that together perform a specialized function: the alimentary tract. (noun)
• Anatomy A bundle of nerve fibers having a common origin, termination, and function. (noun)
• Archaic A stretch or lapse of time. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This tract is a portion of Tract No. 1 described in Executive Order No. 6408 of November 7, 1933."
• "The digestive tract is an intricate ballet of organisms, pH, enzymes, nutrients, peptides, and hormones in a dance with its human interface of cells, nerves, blood, lymph, and other fluids."
• "The Ecosystem of the digestive tract is a harmonious balance of craziness."