noun · 14 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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General-American:/ˈfaɪ.bɚ/
US:Recorded audio is listed in the source snapshot.
Received-Pronunciation:/ˈfaɪ.bə/
rhymes with -aɪbə(ɹ)
CMU ARPABET:F AY1 B ER0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread.
Definition source: English Wiktionary via Wiktextract
Usage: US, countable
Examples
The microscope showed a single blue fiber stuck to the sole of the shoe.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
A material in the form of fibers.
Definition source: English Wiktionary via Wiktextract
Usage: US, uncountable
Examples
The cloth is made from strange, somewhat rough fiber.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
A material whose length is at least 1000 times its width.
Definition source: English Wiktionary via Wiktextract
Usage: US, countable, uncountable
Topics: business, manufacturing, textiles
Examples
Please use polyester fiber for this shirt.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
Dietary fiber.
Definition source: English Wiktionary via Wiktextract
Usage: US, countable, uncountable
Examples
Fresh vegetables are a good source of fiber.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
Moral strength and resolve.
Definition source: English Wiktionary via Wiktextract
Usage: US, countable, figuratively, uncountable
Examples
The ordeal was a test of everyone's fiber.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
noun
Meaning 6
The preimage of a given point in the range of a map.
Definition source: English Wiktionary via Wiktextract
Usage: US, countable, uncountable
Topics: mathematics, sciences
Examples
Under this map, any two values in the fiber of a given point on the circle differ by 2π.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
7
noun
Meaning 7
The pullback of a morphism along a global element (called the fiber of the morphism over the global element).
Definition source: English Wiktionary via Wiktextract