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

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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

There’s an effort to replace the statue with one made out of a fiber filament. USA TODAY, "Kacey Musgraves, sneaker flap, skiing in July: News from around our 50 states," 3 July 2019 Mash and garnish this fruit with an ounce of pumpkin seeds, which supply plant protein, fiber, heart-healthy fat, zinc for immunity and healing, and magnesium. Cynthia Sass, Mph, Health.com, "7 Healthy Late-Night Snacks," 3 July 2019 They are made of mink, faux mink, sable, silk, cashmere, or synthetic fibers. Beth Teitell, BostonGlobe.com, "When it comes to eyelash extensions, the demand is unreal," 3 July 2019 With FiOS fiber service, each house is equipped with an Optical Network Terminal (ONT), which does the heavy lifting of communicating with the FiOS network. Jon Brodkin, Ars Technica, "Frontier customer bought his own router—but has to pay $10 rental fee anyway," 2 July 2019 The Cherry Creek Arts Festival is juried and competitive — more than 2,000 artists applied for the 265 spots awarded this year across 13 media categories, ranging from jewelry to ceramics to fiber to printmaking. Ray Mark Rinaldi, The Know, "The business of art: Cherry Creek Arts Fest helps develop new collectors," 30 June 2019 Açaí berries, rich in antioxidants and high in fiber, are either pureed or blended with coconut or almond milk to form the base. Joey Morona, cleveland.com, "Vitality Bowls brings açaí bowl craze to Rocky River," 28 June 2019 Acetate flake is used to make plastics, films and fibers. Kara Carlson, Dallas News, "Irving-based Celanese Corp. shuts down Mexican chemicals plant, cuts 200 jobs," 28 June 2019 These sugars generally come in more modest amounts, and alongside a plethora of other good-for-you nutrients like fiber or protein, board-certified health and wellness coach Kim Larson, R.D.N., tells SELF. Carolyn L. Todd, SELF, "How Much Do You Really Need to Worry About Sugar?," 27 June 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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Dictionary Entries near fiber

fiat money

fib

fibbery

fiber

fiberboard

fiber box

fiber can

Statistics for fiber

Last Updated

8 Jul 2019

Look-up Popularity

Time Traveler for fiber

The first known use of fiber was in 1607

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More Definitions for fiber

fiber

noun

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

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 : 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

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More from Merriam-Webster on fiber

Rhyming Dictionary: Words that rhyme with fiber

Thesaurus: All synonyms and antonyms for fiber

Spanish Central: Translation of 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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