Thread  —n. 1 a spun-out cotton, silk, or glass etc.; yarn. B length of this. 2 thin cord of twisted yarns used esp. In sewing and weaving. 3 continuous aspect of a thing (the thread of life; thread of his argument). 4 spiral ridge of a screw. —v. 1 pass a thread through (a needle). 2 put (beads) on a thread. 3 insert (a strip of material, e.g. Film or magnetic tape) into equipment. 4 make (one's way) carefully through a crowded place, over a difficult route, etc. [old english: related to *throw]