tract
1 Americannoun
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Anatomy.
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a definite region or area of the body, especially a group, series, or system of related parts or organs.
the digestive tract.
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a bundle of nerve fibers having a common origin and destination.
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Roman Catholic Church. an anthem consisting of verses of Scripture, sung after the gradual in the Mass from Septuagesima until the day before Easter and on certain other occasions, taking the place of the alleluias and the verse that ordinarily accompany the gradual.
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Ornithology. a pteryla.
noun
noun
noun
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an extended area, as of land
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anatomy a system of organs, glands, or other tissues that has a particular function
the digestive tract
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a bundle of nerve fibres having the same function, origin, and termination
the optic tract
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archaic an extended period of time
noun
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A series of body organs that work together to perform a specialized function, such as digestion.
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A bundle of nerve fibers, especially in the central nervous system, that begin and end in the same place and share a common function.
Etymology
Origin of tract1
First recorded in 1350–1400; (in senses referring to extent of space) from Latin tractus “stretch (of space or time), a drawing out,” equivalent to trac-, variant stem of trahere “to draw” + -tus suffix of verbal action; tract 1 def. 4 is from Medieval Latin tractus, apparently identical with the above, though literal sense unexplained
Origin of tract2
1400–50; late Middle English tracte, apparently shortening of Medieval Latin tractātus tractate
Explanation
A tract is a large, open piece of land — like that tract of farmland you bought when you decided your dream in life was to raise llamas. Tract is also a word for a short pamphlet or booklet, like that tract you recently read entitled "The Care and Feeding of Llamas." In addition to referring to areas of land and small booklets, the word tract can describe complicated systems or structures in the body. If you were to unwind your intestine, an important part of your digestive tract, it would not stretch across a large tract of land, but only 25-28 feet — but that's still pretty long! (You probably don't need to read a tract on human anatomy to realize this would be an unhealthy experiment.)
Vocabulary lists containing tract
The Vocabulary.com Top 1000
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The Adventures of Huckleberry Finn
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Persepolis
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Kim, 64, from Milton Keynes, lost all four limbs eight years ago after contracting sepsis from a urinary tract infection.
From BBC • May 7, 2026
The biotechnology company was testing a combination of its lead asset, tovecimig, and paclitaxel in patients with biliary tract cancer.
From Barron's • Apr. 27, 2026
“Inadequate nutrition, particularly vitamin A deficiency, can impair the lining of the digestive tract, predisposing birds to inflammation and secondary illness.”
From Los Angeles Times • Apr. 20, 2026
“The following year, in 1961, we moved to a four-bedroom, white tract house with green trim in Thousand Oaks,” Russell said.
From MarketWatch • Mar. 26, 2026
The stones were laid out in rows like tract homes.
From "The Secret History" by Donna Tartt
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.