Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “fiber”

fiber

noun [C/U] (MATERIAL)   /ˈfɑɪ·bər/
any of the thin parts like thread that form plant or artificial material, esp. those that can be made into cloth, or a mass of such parts twisted together: [C] Police detectives found cloth fibers at the crime scene that matched those from the coat the suspect was wearing. Fiber can also refer to thin, strong structures that connect the body: [U] muscle fiber
(Definition of fiber noun (MATERIAL) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of fiber

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More