Standard Lemma guide

fiber

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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • 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

Usage: US, countable, uncountable

Topics: category-theory, computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

A kind of lightweight thread of execution.

Definition source: English Wiktionary via Wiktextract

Usage: US, countable, uncountable

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

A long tubular cell found in bodily tissue.

Definition source: English Wiktionary via Wiktextract

Usage: US, countable, uncountable

Topics: biology, cytology, medicine, natural-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

a leatherlike material made by compressing layers of paper or cloth

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fibre, vulcanized fiber

Antonyms: none provided

Broader terms: fabric, cloth, material, textile

11

noun

Meaning 11

the inherent complex of attributes that determines a persons moral and ethical actions and reactions- Herbert Spencer

Definition source: Princeton WordNet 3.0

Examples

  • education has for its object the formation of character

Meaning relationships

Synonyms: character, fibre

Antonyms: none provided

Broader terms: trait

Narrower terms: spirit

12

noun

Meaning 12

any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fibre

Antonyms: none provided

Broader terms: cell

Narrower terms: muscle cell, muscle fiber, muscle fibre, nerve fiber, nerve fibre

13

noun

Meaning 13

coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: roughage

Antonyms: none provided

Broader terms: foodstuff, food product

Narrower terms: bran

14

noun

Meaning 14

a slender and greatly elongated substance capable of being spun into yarn

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fibre

Antonyms: none provided

Broader terms: material, stuff

Narrower terms: byssus, beard, bristle, optical fiber, glass fiber, optical fibre, glass fibre, nerve fiber, nerve fibre, spindle, loofa, loofah, luffa, loufah sponge, cantala, Cebu maguey, manila maguey, bassine, coir, raffia, string, fibril, filament, strand, lint, man-made fiber, synthetic fiber, natural fiber, natural fibre, oakum, raveling, ravelling

History

Etymology

From French fibre, from Old French fibre, from Latin fibra.

Real reading context

fiber in complete knowledge articles