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fiber - definition and synonyms


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noun fiber pronunciation in American English /ˈfaɪbər/
Word Forms
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  1. 1
    [uncountable] the parts of fruit, vegetables, and grains that your body cannot digest (=change into substances it can use). It helps food to pass through your body
    dietary fiber
    high/rich/low in fiber: foods that are high in fiber
  2. 2
    [countable] a long thin piece of a natural or artificial substance, similar to a thread or hair in shape
    Coir is a strong material made from coconut fibers.
    1. a.
      [countable/uncountable] a type of cloth or similar material made of fibers
      man-made/synthetic/natural fibers: natural fibers such as linen and cotton
      tubes made of carbon fiber
  3. 3
    [countable/uncountable] [usually plural] one of the thin pieces that form the nerves and muscles in your body
    nerve/muscle fibers: Messages pass along the nerve fibers.



a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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