Definition of thread

• n. - 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.
• n. - A filament, as of a flower, or of any fibrous substance, as of bark; also, a line of gold or silver.
• n. - The prominent part of the spiral of a screw or nut; the rib. See Screw, n., 1.
• n. - Fig.: Something continued in a long course or tenor; a,s the thread of life, or of a discourse.
• n. - Fig.: Composition; quality; fineness.
• v. t. - To pass a thread through the eye of; as, to thread a needle.
• v. t. - To pass or pierce through as a narrow way; also, to effect or make, as one's way, through or between obstacles; to thrid.
• v. t. - To form a thread, or spiral rib, on or in; as, to thread a screw or nut.