fiber

noun

fi·ber | \ ˈfī-bər

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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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.

Recent Examples on the Web

He is sent to Liaoyang near the North Korean border to help build a synthetic fiber factory. — Josh Chin, WSJ, "Huawei CEO Says Company Doesn’t Spy for China, Praises Trump," 15 Jan. 2019 And because termites bring the toxic wood fibers back to the nest, bait stations are effective at wiping out the entire colonies. — Joseph Truini, Popular Mechanics, "How to Get Rid of Termites," 8 Jan. 2019 Compared to textured cotton towels, the fibers are much smaller and finer, actively wicking water away without causing friction. — Sarah Wu, Glamour, "This $30 Aquis Towel Completely Saved My Hair Color," 10 Dec. 2018 Bamboo is a soft, breathable fiber made from renewable bamboo grass. — Hannah Morrill, ELLE Decor, "The Best Luxury Sheets For the Perfect Night's Sleep," 15 Nov. 2018 Reflectix: Any van life veteran knows about Reflectix ($52.89), a reflective insulation that’s fiber free, lightweight, and easy to install. — Megan Barber, Curbed, "The ultimate van life shopping guide," 14 Nov. 2018 The second component is being able to use healing, cooling, and pressure to create something analogous to muscle fibers. — Angela Chen, The Verge, "These are the technology advances that could end animal farming," 9 Nov. 2018 So instead, start your day off with a protein and fiber-rich breakfast. — Jenna Rosenstein, Harper's BAZAAR, "The Holidays Are Coming—Here's How To Get Back On Track After a Big Meal," 19 Oct. 2018 Go easy on the spot treatments Yes, every fiber of your being wants to bomb your face with all the anti-acne creams and every beauty hack you’ve ever read — or at least reapply a spot treatment a zillion times throughout the day. — Beth Janes, Seventeen, "What to Do the *Second* a Pimple Appears," 7 Aug. 2018

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.