—n. 1. the alimentary canal, esp. between the pylorus and the anus, or some portion of it. Cf. foregut, midgut, hindgut. 2. guts, a. the bowels or entrails.
b. Informal.courage and fortitude; nerve; determination; stamina: Climbing that cliff takes a lot of guts. c. 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.a gut course.
9. spill one's guts,Slang.to tell all; lay oneself bare: the famous star spills his guts in his autobiography.
—v.t. 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.
—adj. Informal. a. basic or essential: to discuss the gut issues. b. based on instincts or emotions: a gut reaction; gut decisions.