say it: FAHY-bur
fibre is a noun meaning "a slender and greatly elongated substance capable of being spun into yarn". It carries 4 recorded senses.
any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)
the inherent complex of attributes that determines a persons moral and ethical actions and reactions
“education has for its object the formation of character”
a leatherlike material made by compressing layers of paper or cloth
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for fibre come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.