TextileGlossary.com

A very small twist of flax, wool, cotton, silk, or other fibrous substance, drawn out to considerable length; a compound cord consisting of two or more single yarns doubled, or joined together, and twisted.

a) The result of twisting together, in one or more operations, two or more single, folded or cabled yarns (see under yarn). b) A product as defined in (a) above and intended primarily for sewing purposes and known as a sewing thread. c) A component of silk yarn, and that is the product of winding together, without twist, a number of baves (q.v.), e.g. a 3-thread silk yarn is the result of folding three such products together. NOTE: "1. The term "thread" is frequently used to describe single yarns." "2. The term "thread" is also used in such expressions as "threads per unit length", irrespective of their nature."

A fine, string-like length of material made up of two or more fibers of spun cotton, flax, wool, silk, etc. twisted together.

Fine cord of natural or synthetic material made from two or more filaments twisted together and used in stitching. Machine embroidery threads come in rayon, which has a light sheen; cotton, which has a duller sheen than rayon, but is available in very fine deniers; polyester, which is strong and colorfast; and metallics, which have a high luster and are composed of a synthetic core wrapped in metal foil.