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fiber

noun
fi·​ber | \ ˈfī-bər How to pronounce fiber (audio) \

Definition of fiber

1 : a thread or a structure or object resembling a thread: such as
a(1) : a slender root (as of a grass)
(2) : an elongated tapering thick-walled plant cell void at maturity that imparts elasticity, flexibility, and tensile strength
b(1) : a strand of nerve tissue : axon, dendrite
(2) : one of the filaments composing most of the intercellular matrix of connective tissue
(3) : one of the elongated contractile cells of muscle tissue
c : a slender and greatly elongated natural or synthetic filament (as of wool, cotton, asbestos, gold, glass, or rayon) typically capable of being spun into yarn
d : mostly indigestible material in food (such as legumes, whole grains, and vegetables) that stimulates the intestine to peristalsis and promotes elimination of waste from the large intestine : bulk, roughage dietary fiber trying to get more fiber in her diet
2 : material made of fibers especially : vulcanized fiber
3a : an element that gives texture or substance
b : basic toughness : strength, fortitude
c : essential structure or character the very fiber of a person's being
Other Words from fiber Synonyms & Antonyms Example Sentences Learn More about fiber

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Other Words from fiber

fibered \ ˈfī-​bərd How to pronounce fibered (audio) \ adjective

Examples of fiber in a Sentence

It's important to get enough fiber in your diet. What foods do you recommend as good sources of fiber? foods that are high in fiber The fabric is made from a mix of synthetic fibers. The natural fibers allow the fabric to breathe. The paper is made from both cotton and wood fiber. Nylon is a very strong man-made fiber. The police examined hair and bits of fiber found in the victim's car.
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Recent Examples on the Web

 With a bit of planning, breakfast can be a great opportunity to get dairy, fiber, fruits and even vegetables into a child’s diet. — Melissa Rayworth, Houston Chronicle, "Healthful breakfast on a busy school morning? It’s not so hard," 14 Aug. 2019 Verizon also objected to other Rochester fees, including $10,000 up front for deploying up to 2,500 linear feet of underground fiber, plus $5,000 annually in subsequent years. — Jon Brodkin, Ars Technica, "Verizon sues city to avoid paying 5G fees, says the FCC has its back," 13 Aug. 2019 The socks are made of an entirely new material, which is a proprietary combination of wool and eucalyptus fiber, and which the company calls Trino. — Shannon Fitzgerald, Fortune, "Cult Shoe Brand Allbirds Steps in a New Direction: Eco-Friendly Socks," 13 Aug. 2019 These small but mighty seeds have omega-3s, fiber, protein, essential minerals, and antioxidants. — SELF, "19 Healthy, High-Fat Foods to Keep You Full and Satisfied," 8 Aug. 2019 People today use seventy-two per cent of the earth’s ice-free land for food, animal feed, fiber, timber, and energy. — Carolyn Kormann, The New Yorker, "Deforestation, Agriculture, and Diet Are Fuelling the Climate Crisis," 8 Aug. 2019 And the psychological benefits of food join a host of positive physical effects: the potential lifesaving properties of fiber, antioxidants, and vitamins in fighting chronic diseases. — Michelle Stacey, Allure, "The "Food as Medicine" Doctrine Hurts More Than It Helps," 8 Aug. 2019 The soft linen, cotton and wool strands keep company with a thicker, reed-like brown fiber, identified as paper, whose assertively different texture and tempo enliven the surface even more. — Leah Ollman, Los Angeles Times, "Long live Anni Albers: L.A. show pays homage to an overshadowed Bauhaus artist," 5 Aug. 2019 Every fiber and strand of my childhood Broadway dreams right here in vivid technicolor reality. — Brandon Uranowitz, Town & Country, "Legendary Broadway Director Hal Prince Remembered For His "Immovable Reverence for Talent"," 5 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fiber.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fiber

1607, in the meaning defined at sense 1

History and Etymology for fiber

Middle French fibre, from Latin fibra

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More Definitions for fiber

fiber

noun
How to pronounce fiber (audio)

English Language Learners Definition of fiber

: plant material that cannot be digested but that helps you to digest other food
: a thin thread of natural or artificial material that can be used to make cloth, paper, etc.
: material (such as cloth) that is made from thin threads : something made of fibers

See the full definition for fiber in the English Language Learners Dictionary

fiber

noun
fi·​ber | \ ˈfī-bər How to pronounce fiber (audio) \

Kids Definition of fiber

1 : a thread or a structure or object resembling a thread
2 : plant material that cannot be digested

fiber

noun
fi·​ber
variants: or chiefly British fibre \ ˈfī-​bər How to pronounce fibre (audio) \

Medical Definition of fiber

1 : a thread or a threadlike structure or object: as
a

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