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

fibered \ ˈfī-​bərd How to pronounce fiber (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. See More
Recent Examples on the Web Diversity and inclusion is something that is part of our company's fiber from the beginning. Kevin Kruse, Forbes, 6 May 2022 Choose corn tortillas, which are not only more traditional than flour but also lower in calories and sodium and higher in fiber. Bethany Thayer, Detroit Free Press, 30 Apr. 2022 In the past, brands have mislabeled their sheets when they weren't actually made of this luxury cotton fiber. Grace Wu, Good Housekeeping, 18 Apr. 2022 Along with micronutrients like vitamins A, C, and K, one cup of raw asparagus contains nearly three grams of fiber, according to the U.S. Department of Agriculture. Marygrace Taylor, SELF, 16 Apr. 2022 Dates were an essential part of the nomadic diet, providing a significant amount of fiber and a variety of vitamins and minerals. Felicia Campbell, USA TODAY, 14 Apr. 2022 Dates were an essential part of the nomadic diet, providing a significant amount of fiber and a variety of vitamins and minerals. Felicia Campbell, The Arizona Republic, 8 Apr. 2022 For the health-conscious, black beans are a great source of fiber, protein, and folate (which is the naturally occurring form of vitamin B9, an essential nutrient crucial for proper brain function, cell growth, and mental and emotional health). Bon Appétit, 5 Apr. 2022 Fruits and vegetables are high in fiber, contain a variety of necessary vitamins and minerals and also provide hydration. Los Angeles Times, 1 Apr. 2022 See More

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.

First Known Use of fiber

1607, in the meaning defined at sense 1

History and Etymology for fiber

Middle French fibre, from Latin fibra

Learn More About fiber

Dictionary Entries Near fiber

fibbery

fiber

fiberboard

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Statistics for fiber

Last Updated

11 May 2022

Cite this Entry

“Fiber.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fiber. Accessed 17 May. 2022.

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More Definitions for fiber

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 fiber (audio) \

Medical Definition of fiber

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

Nglish: Translation of fiber for Spanish Speakers

Britannica English: Translation of fiber for Arabic Speakers

Britannica.com: Encyclopedia article about fiber

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