1.  fiber(n = noun.substance) fibre - a slender and greatly elongated substance capable of being spun into yarn;
is a kind of material, stuff
has particulars: beard, byssus, bristle, glass fiber, glass fibre, optical fiber, optical fibre, nerve fiber, nerve fibre, spindle, loofa, loofah, loufah sponge, luffa, 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
Derived form adjective fibrous₁

2.  fiber(n = noun.food) roughage - coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis;
is a kind of food product, foodstuff
has particulars: bran

3.  fiber(n = noun.body) fibre - any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber);
is a kind of cell
has particulars: muscle cell, muscle fiber, muscle fibre, nerve fiber, nerve fibre

4.  fiber(n = noun.attribute) character, fibre - the inherent complex of attributes that determines a persons moral and ethical actions and reactions; "education has for its object the formation of character"
is a kind of trait
is a part of personality
has parts: thoughtfulness, responsibility, responsibleness, integrity
has particulars: spirit

5.  fiber(n = noun.artifact) fibre, vulcanized fiber - a leatherlike material made by compressing layers of paper or cloth;
is a kind of cloth, fabric, material, textile

1.  One of the delicate, threadlike portions of which the tissues of plants and animals are in part constituted; as, the fiber of flax or of muscle. [1913 Webster]

2.  Any fine, slender thread, or threadlike substance; as, a fiber of spun glass; especially, one of the slender rootlets of a plant. [1913 Webster]

3.  the inherent complex of attributes that determine a person's moral and ethical actions and reactions; sinew; strength; toughness; as, a man of real fiber. [1913 Webster]
"Yet had no fibers in him, nor no force." [1913 Webster]

4.  A general name for the raw material, such as cotton, flax, hemp, etc., used in textile manufactures. [1913 Webster]

5.  that portion of food composed of carbohydrates which are completely or partly indigestible, such as cellulose or pectin; it may be in an insoluble or a soluble form. It provides bulk to the solid waste and stimulates peristalsis in the intestine. It is found especially in grains, fruits, and vegetables. There is some medical evidence which indicates that diets high in fiber reduce the risk of colon cancer and reduce cholesterol levels in the blood. It is also called dietary fiber, roughage, or bulk. [PJC]

6.  a leatherlike material made by compressing layers of paper or cloth. [WordNet 1.5]

fiber, US var. of FIBRE.

N  connection, vinculum, link, connective, connection, junction, bond of union, copula, hyphen, intermedium, bracket, bridge, stepping-stone, isthmus, bond, tendon, tendril, fiber, cord, cordage, riband, ribbon, rope, guy, cable, line, halser, hawser, painter, moorings, wire, chain, string, fastener, fastening, tie, ligament, ligature, strap, tackle, rigging, standing rigging, running rigging, traces, harness, yoke, band ribband, bandage, brace, roller, fillet, inkle, with, withe, withy, thong, braid, girder, tiebeam, girth, girdle, cestus, garter, halter, noose, lasso, surcingle, knot, running knot, cabestro, cinch, lariat, legadero, oxreim, suspenders, pin, corking pin, nail, brad, tack, skewer, staple, corrugated fastener, clamp, U-clamp, C-clamp, cramp, cramp iron, ratchet, detent, larigo, pawl, terret, treenail, screw, button, buckle, clasp, hasp, hinge, hank, catch, latch, bolt, latchet, tag, tooth, hook, hook and eye, lock, holdfast, padlock, rivet, anchor, grappling iron, trennel, stake, post, cement, glue, gum, paste, size, wafer, solder, lute, putty, birdlime, mortar, stucco, plaster, grout, viscum, shackle, rein, prop.

N  filament, line, fiber, fibril, funicle, vein, hair, capillament, cilium, cilia, pilus, pili, tendril, gossamer, hair stroke, veinlet, venula, venule, wire, string, thread, packthread, cotton, sewing silk, twine, twist, whipcord, tape, ribbon, cord, rope, yarn, hemp, oakum, jute, strip, shred, slip, spill, list, band, fillet, fascia, ribbon, riband, roll, lath, splinter, shiver, shaving, beard, ramification, strand, filamentous, filamentiferous, filaceous, filiform, fibrous, fibrillous, thread-like, wiry, stringy, ropy, capillary, capilliform, funicular, wire-drawn, anguilliform, flagelliform, hairy, taeniate, taeniform, taenioid, venose, venous.

acrylic fiber, animal fiber, bast fiber, castor fiber, cotton fiber, fiber bundle, fiber optic cable, fiber optics, glass fiber, man-made fiber, medullated nerve fiber, motor nerve fiber, muscle fiber, myelinated nerve fiber, natural fiber, nerve fiber, optical fiber, plant fiber, polyester fiber, purkinje fiber, staple fiber, striated muscle fiber, synthetic fiber, tampico fiber, vulcanized fiber