Definition of fiber
1 : a thread or a structure or object resembling a thread: as a (1) : a slender root (as of a grass) (2) : an elongated tapering thick-walled plant cell void at maturity that imparts elasticity, flexibility, and tensile strength b (1) : a strand of nerve tissue : axon, dendrite (2) : one of the filaments composing most of the intercellular matrix of connective tissue (3) : one of the elongated contractile cells of muscle tissue c : a slender and greatly elongated natural or synthetic filament (as of wool, cotton, asbestos, gold, glass, or rayon) typically capable of being spun into yarn d : mostly indigestible material in food that stimulates the intestine to peristalsis —called also bulk, roughage
fiberedplay \-bərd\ adjective
Examples of fiber in a sentence
It's important to get enough fiber in your diet.
What foods do you recommend as good sources of fiber?
foods that are high in fiber
The fabric is made from a mix of synthetic fibers.
The natural fibers allow the fabric to breathe.
The paper is made from both cotton and wood fiber.
Nylon is a very strong man-made fiber.
The police examined hair and bits of fiber found in the victim's car.
Origin and Etymology of fiber
Middle French fibre, from Latin fibra
First Known Use: 1540
FIBER Defined for English Language Learners
Definition of fiber for English Language Learners
: plant material that cannot be digested but that helps you to digest other food
: a thin thread of natural or artificial material that can be used to make cloth, paper, etc.
: material (such as cloth) that is made from thin threads : something made of fibers
FIBER Defined for Kids
Definition of fiber for Students
1 : a thread or a structure or object resembling a thread
2 : plant material that cannot be digested
Medical Definition of fiber
1: a thread or a threadlike structure or object: asa: a strand of nerve tissue : axon, dendriteb: one of the filaments composing most of the intercellular matrix of connective tissuec: one of the elongated contractile cells of muscle tissue
2: mostly indigestible material in food that stimulates the intestine to peristalsis—called also bulk, dietary fiber, roughage
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