Meaning of “fibre” in the English Dictionary

"fibre" in British English

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UK US fiber uk /ˈfaɪ.bər/ us /ˈfaɪ.bɚ/

fibre noun (THREAD)

[ C ] any of the thread-like parts that form plant or artificial material and can be made into cloth:

The fibres are woven into fabric.

[ C or U ] threads when they are in a mass that can be used for making products such as cloth and rope:

Natural fibres such as cotton tend to be cooler.

[ C or U ] one of various thread-like structures in the body, such as those found in muscle:

muscle fibre(s)

More examples

  • Glass fibre is often used as roof insulation.
  • They refuse to buy clothes made of artificial or synthetic fibres.

fibre noun (FOOD)

C1 [ U ] a substance in certain foods, such as fruit, vegetables, and brown bread, that travels through the body as waste and helps the contents of the bowels to pass through the body easily:

You should eat more dietary fibre to reduce the risk of bowel cancer.

More examples

  • If you ate more fibre you wouldn't get constipated.
  • You should eat more food that contains a lot of fibre, e.g. fruit, vegetables, and bread.

(Definition of “fibre” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"fibre" in Business English

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uk /ˈfaɪbər/ us UK US fiber

[ C or U ] a thread-like part made from plants or artificial material which can be made into products:

Natural fibres such as cotton tend to be cooler.
artificial/man-made/synthetic fibre(s)
They use lightweight carbon fiber for auto bodies.
The data-carrying capacity of a strand of optical fibre is doubling every year.

(Definition of “fibre” from the Cambridge Business English Dictionary © Cambridge University Press)