fiber

noun

fi·​ber ˈfī-bər How to pronounce fiber (audio)
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
3
a
: 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
fibered 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. See More
Recent Examples on the Web Long COVID patients also had more severe muscle damage after their workouts, and had signs of abnormal immune system activity in their muscle fibers. Claire Maldarelli, Popular Science, 14 Feb. 2024 Eating more soluble fiber in the form of legumes, whole grains, seeds, fruit and vegetables can help bind cholesterol in the digestive tract and remove it from your body. Knvul Sheikh, San Diego Union-Tribune, 13 Feb. 2024 At 35 percent off, this bundle is a steal with fabric made from bamboo and an ultra-soft French flax linen that provides ultimate comfort with high-quality fibers to lull you to sleep. Merrell Readman, Travel + Leisure, 12 Feb. 2024 There are several more stages before fibers become fabric. Erik Matuszewski, Forbes, 10 Feb. 2024 Made with hemp fibers, cotton, and spandex, these gloves are moisture-absorbent and soft enough to keep your hands cool throughout the day or night. Sarah Bradley, Verywell Health, 5 Feb. 2024 Each diet contained the exact same quantity of calories, sugars, fiber, fat, salt and carbohydrates — the only difference was that one diet consisted only of foods that were ultraprocessed, Hall said. Sandee Lamotte, CNN, 1 Feb. 2024 They are packed with incredible flavor and loads of cholesterol-lowering fiber, protein and B vitamins. Jennifer Lover, Charlotte Observer, 31 Jan. 2024 Elephant dung gives new meaning to the phrase fiber in the diet. David E. Petzal, Field & Stream, 31 Jan. 2024 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'fiber.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle French fibre, from Latin fibra

First Known Use

1607, in the meaning defined at sense 1

Time Traveler
The first known use of fiber was in 1607

Dictionary Entries Near fiber

Cite this Entry

“Fiber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fiber. Accessed 27 Feb. 2024.

Kids Definition

fiber

noun
fi·​ber ˈfī-bər How to pronounce fiber (audio)
1
: a thread or a structure or object resembling a thread: as
a
: a slender root (as of a grass)
b
: a long tapering thick-walled plant cell especially of vascular tissue
c
: a muscle cell
d
e
: a slender and very long natural or synthetic unit of material (as wool, cotton, asbestos, gold, glass, or rayon) usually able to be spun into yarn
f
: mostly indigestible material in food that stimulates the intestine to move its contents along

called also bulk, roughage

2
: material made of fibers
3
: basic toughness : strength
moral fiber

Medical Definition

fiber

noun
fi·​ber
variants or chiefly British fibre
1
: a thread or a threadlike structure or object: as
a
: a strand of nerve tissue : axon, dendrite
b
: one of the filaments composing most of the intercellular matrix of connective tissue
c
: one of the elongated contractile cells of muscle tissue
2
: mostly indigestible material in food that stimulates the intestine to peristalsis

called also bulk, dietary fiber, roughage

More from Merriam-Webster on fiber

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