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  • gut
    gut
    noun
    the alimentary canal, especially between the pylorus and the anus, or some portion of it.
  • GUT
    GUT
    grand unification theory.
Synonyms

gut

1 American  
[guht] / gʌt /

noun

  • guts
    plural
  1. the alimentary canal, especially between the pylorus and the anus, or some portion of it.

  2. guts,

    1. bowels or entrails.

    2. Informal. courage and fortitude; nerve; determination; stamina.

      Climbing that cliff takes a lot of guts.

    3. the inner working parts of a machine or device.

      The mechanic had the guts of the refrigerator laid out on the kitchen floor.

  3. the belly; stomach; abdomen.

  4. the substance forming the case of the intestine; intestinal tissue or fiber.

    sheep's gut.

  5. a preparation of the intestines of an animal, used for various purposes, as for violin strings, tennis rackets, or fishing lines.

  6. the silken substance taken from a silkworm killed when about to spin its cocoon, used in making snells for fishhooks.

  7. a narrow passage, as a channel of water or a defile between hills.

  8. Slang. Also gut course snap course.


verb (used with object)

  • guts,
    present (3rd person singular)
  • gutted,
    past participle,  past
  • gutting
    present participle
  1. to take out the guts or entrails of; disembowel.

  2. to destroy the interior of.

    Fire gutted the building.

  3. to plunder (a house, city, etc.) of contents.

    Invaders gutted the village.

  4. to remove the vital or essential parts from.

    The prisoner's letters were gutted by heavy censorship.

adjective

  1. Informal.

    1. basic or essential.

      to discuss the gut issues.

    2. based on instincts or emotions.

      a gut reaction; gut decisions.

idioms

  1. spill one's guts, to tell all; lay oneself bare; confess everything.

    The celebrity chef spills his guts in his autobiography.

GUT 2 American  
Physics.
  1. grand unification theory.


gut 1 British  
/ ɡʌt /

noun

    1. the lower part of the alimentary canal; intestine

    2. the entire alimentary canal

  1. (often plural) the bowels or entrails, esp of an animal

  2. slang the belly; paunch

  3. See catgut

  4. a silky fibrous substance extracted from silkworms, used in the manufacture of fishing tackle

  5. a narrow channel or passage

  6. informal (plural) courage, willpower, or daring; forcefulness

  7. informal (plural) the essential part

    the guts of a problem

  8. informal to make an intense effort

  9. informal to be extremely angry with someone

  10. informal to dislike a person very strongly

  11. informal to work very hard

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to remove the entrails from (fish, etc)

  2. (esp of fire) to destroy the inside of (a building)

  3. to plunder; despoil

    the raiders gutted the city

  4. to take out the central points of (an article), esp in summary form

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. informal arising from or characterized by what is basic, essential, or natural

    a gut problem

    a gut reaction

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
GUT 2 British  
/ ɡʌt /

acronym

  1. grand unified theory

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

gut 1 Scientific  
/ gŭt /
  1. The intestine of a vertebrate animal.

  2. The alimentary canal of an invertebrate animal.

  3. The tube in a vertebrate embryo that later develops into the alimentary canal, lungs, and liver.


GUT 2 Scientific  
  1. Abbreviation of grand unified theory See unified field theory


gut More Idioms  

    More idioms and phrases containing gut


Other Word Forms

Derived Forms

Inflected Forms

Nouns

Participles

Conjugated Forms

Present

Past

Future


Etymology

Origin of gut

First recorded before 1000; Middle English gut, guttes (plural), Old English guttas (plural), akin to gēotan “to pour”


Explanation

Your gut is part of your digestive system — it's where food goes after you eat it, to get broken down into nutrients and waste. The expression to "go with your gut" means to follow your instincts, how you feel in your belly. Your gut is quite literally your intestines, although the word is frequently used for any part of your digestive system, especially your stomach. Eating too much ice cream can give you an ache in your gut. When gut is a verb, it means to clean the internal organs out of a fish or other animal you intend to eat, or to completely empty a building. Colloquially, if you have guts, you're very brave.

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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.

See Examples For:

By addressing harmful gut bacteria and restoring the intestinal barrier, researchers may be able to protect the liver through a treatment that acts primarily outside the organ itself.

From Science Daily ● Oct. 17, 2026

Prices recently dipped to near all-time lows, a gut punch for the many employees who get much of their pay in shares.

From The Wall Street Journal ● Oct. 17, 2026

Substances absorbed from the intestines travel to the liver through the bloodstream, making liver health particularly sensitive to changes in gut bacteria and intestinal barrier function.

From Science Daily ● Oct. 17, 2026

At Lumen, leaders are assigned to a peer, and the two must be open with each other and act as a gut check.

From The Wall Street Journal ● Oct. 16, 2026

It was like a punch to the gut, knowing that a girl born there could end up a common pickpocket in the slums of the Levee.

From "The City Beautiful" by Aden Polydoros

“You manage a baseball game with your EYES, HEART, & GUT as well as your BRAIN,” Blevins posted.

From Seattle Times ● Oct. 27, 2020

If the GUT approach is right, the average decay time in question is far longer than the age of the universe itself.

From Economist ● Jan. 11, 2018

In GUT models, the forces that we are familiar with here on Earth, including gravity and electromagnetism, behaved very differently in the extreme conditions of the early universe than they do today.

From Textbooks ● Oct. 13, 2016

The model of the car was unknown, according to the police call, but its plates included the letters and numbers GUT 18053.

From The Guardian ● Nov. 15, 2015

The bringing up of the boys he deigned to approve of: 'FAST SO GUT WIE EIN BAUER,' was his trenchant criticism.

From Memoir of Fleeming Jenkin by Robert Louis Stevenson

"I can still not believe it. I worked so hard towards this goal, and it takes guts to truly believe in it with your whole heart," she said.

From BBC ● Sep. 26, 2026

"I didn't write this novel with my head, but with my guts and my heart," he told AFP recently.

From Barron's ● Sep. 25, 2026

Conversations like this reminded me that people with little power are often attuned to the differences between what they hear from authorities and what they know in their guts.

From Salon ● Sep. 19, 2026

In the mouse experiment, none of the human Roseburia species permanently colonized the animals' guts.

From Science Daily ● Aug. 22, 2026

He said that if she wasn’t up to her elbows in the guts of a newly dead animal, she was in the ocean, looking for live ones—salt and microorganisms flowing through her hair.

From "The Line Tender" by Kate Allen

Garmin was best known for car GPS units, a business that smartphones gutted.

From The Wall Street Journal ● Oct. 6, 2026

Acaster, meanwhile, reflected: "I'm gutted to not be a faithful anymore, I don't like lying. But if I don't join them, they'll kill me."

From BBC ● Oct. 2, 2026

Like that gutted TV cabinet, his sad eyes are a window into the sensitive boy inside the grown man.

From Los Angeles Times ● Sep. 11, 2026

Peru, the world's largest catcher of anchovy, is facing a devastating blow from warming seas that have gutted production, according to industry officials.

From Barron's ● Sep. 2, 2026

But over the next few months, I completely gutted my laptop and phone, stayed off-line and out of sight, kept the lowest profile I could.

From "Warcross" by Marie Lu

Damon’s Odysseus is numbed by the massacre of Troy’s civilians; Fiennes’ hates himself for leading the best men of Ithaca to their death, gutting his own community in the heedless destruction of another.

From Los Angeles Times ● Aug. 4, 2026

They predict gutting cuts to women’s teams and Olympic sports, a rollback that’s already begun.

From The Wall Street Journal ● Jun. 4, 2026

"As gutting as it is to miss another Slam, the advice is not to rush straight back into playing five set tennis on clay."

From BBC ● Apr. 29, 2026

In all, Alico began gutting 53,000 citrus acres at the end of the 2025 harvest: 35 percent of Florida’s citrus production, condemned in one press release.

From Slate ● Apr. 20, 2026

“After you gut a few thousand chickens,” Galen said dryly, “you’ll either get really good at it, or you’ll stop gutting chickens.”

From "The Omnivore's Dilemma" by Michael Pollan

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