fiber

F4I1B3E1R1
US/ˈfaɪ.bɚ/UK/ˈfaɪ.bə/

noun

A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread.

“Please use polyester fiber for this shirt.”

Similar
fibreroughagecharactervulcanized fiber
CommonScrabble 10

Meanings

nounfiber (countable and uncountable, plural fibers)

plural fibers · alternative fibre

  1. UScountableA single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread.

    The microscope showed a single blue fiber stuck to the sole of the shoe.

  2. USuncountableA material in the form of fibers.

    The cloth is made from strange, somewhat rough fiber.

  3. UScountableuncountablebusinessA material whose length is at least 1000 times its width.

    Please use polyester fiber for this shirt.

  4. UScountableuncountableDietary fiber.

    Fresh vegetables are a good source of fiber.

  5. UScountablefigurativelyuncountableMoral strength and resolve.

    The ordeal was a test of everyone's fiber.

  6. UScountableuncountablemathematicsThe preimage of a given point in the range of a map.

    Under this map, any two values in the fiber of a given point on the circle differ by 2π.

  7. UScountableuncountablecategory theoryThe pullback of a morphism along a global element (called the fiber of the morphism over the global element).
  8. UScountableuncountablecomputingA kind of lightweight thread of execution.

    We've seen how to create a new fiber and convert the current thread into a fiber (which continues to run after the conversion), but we have yet to focus on how to schedule a new fiber onto the current thread.

    2008, Joe Duffy, Concurrent Programming on Windows, Pearson Education, →ISBN, unnumbered page
  9. UScountableuncountablebiologyA long tubular cell found in bodily tissue.

Synonyms & antonyms

nouna slender and greatly elongated substance capable of being spun into yarn

Similar

nouncoarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis

Broader
foodstufffood product

nounany of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)

Similar
Broader

nounthe inherent complex of attributes that determines a persons moral and ethical actions and reactions

Broader

nouna leatherlike material made by compressing layers of paper or cloth

Similar
fibrevulcanized fiber

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinfibra
  2. Old Frenchfibre
  3. Frenchfibre
  4. Englishfiber

From French fibre, from Old French fibre, from Latin fibra.

Full word history & related roots →

Rhymes & wordplay

Rhymes with fiber

All rhymes →

Anagrams

Cite this entry
APA

fiber. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/fiber

MLA

“fiber.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fiber. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “fiber,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/fiber.

Source: fiber on Wiktionary, CC BY-SA 4.0.