fiber

noun

1. (US, countable)A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread.

   “The microscope showed a single blue fiber stuck to the sole of the shoe.”

2. (US, uncountable)A material in the form of fibers.

   “The cloth is made from strange, somewhat rough fiber.”

3. (US, countable, uncountable)A material whose length is at least 1000 times its width.

   “Please use polyester fiber for this shirt.”

4. (US, countable, uncountable)Dietary fiber.

   “Fresh vegetables are a good source of fiber.”

5. (US, countable, figuratively, uncountable)Moral strength and resolve.

   “The ordeal was a test of everyone's fiber.”

6. (US, countable, uncountable)The preimage of a given point in the range of a map.

   “Under this map, any two values in the fiber of a given point on the circle differ by 2π.”

7. (US, countable, uncountable)The pullback of a morphism along a global element (called the fiber of the morphism over the global element).
8. (US, countable, uncountable)A kind of lightweight thread of execution.

   “We've seen how to create a new fiber and convert the current thread into a fiber (which continues to run after the conversion), but we have yet to focus on how to schedule a new fiber onto the current thread.”

9. (US, countable, uncountable)A long tubular cell found in bodily tissue.