Definitions from Wiktionary ( )

▸ noun:  (countable) A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread.
▸ noun:  (uncountable) A material in the form of fibers.
▸ noun:  (textiles) A material whose length is at least 1000 times its width.
▸ noun:  Dietary fiber.
▸ noun:  (figuratively) Moral strength and resolve.
▸ noun:  (mathematics) The preimage of a given point in the range of a map.
▸ noun:  (category theory) The pullback of a morphism along a global element (called the fiber of the morphism over the global element).
▸ noun:  (computing) A kind of lightweight thread of execution.
▸ noun:  (cytology) A long tubular cell found in bodily tissue.

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