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ENGLISH · A WORD WITH POSSIBILITIES

fiber.

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

5 characters2 syllables approx.English language

Meaning & usage

noun/ˈfaɪ.bɚ/General-American/ˈfaɪ.bə/Received-Pronunciation
  1. A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread.

    US · countable
    The microscope showed a single blue fiber stuck to the sole of the shoe.
  2. A material in the form of fibers.

    US · uncountable
    The cloth is made from strange, somewhat rough fiber.
  3. A material whose length is at least 1000 times its width.

    US · countable · uncountable
    Please use polyester fiber for this shirt.
  4. Dietary fiber.

    US · countable · uncountable
    Fresh vegetables are a good source of fiber.
  5. Moral strength and resolve.

    US · countable · figuratively · uncountable
    The ordeal was a test of everyone's fiber.
  6. The preimage of a given point in the range of a map.

    US · countable · uncountable
    Under this map, any two values in the fiber of a given point on the circle differ by 2π.
  7. The pullback of a morphism along a global element (called the fiber of the morphism over the global element).

    US · countable · uncountable
  8. A kind of lightweight thread of execution.

    US · countable · uncountable
  9. A long tubular cell found in bodily tissue.

    US · countable · uncountable
Where this word comes from

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

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.