Thread

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 filament, as of a flower, or of any fibrous substance, as of bark; also, a line of gold or silver.

The prominent part of the spiral of a screw or nut; the rib. See Screw, n., 1.

Fig.: Something continued in a long course or tenor; a,s the thread of life, or of a discourse.

Fig.: Composition; quality; fineness.

To pass a thread through the eye of; as, to thread a needle.

To pass or pierce through as a narrow way; also, to effect or make, as one's way, through or between obstacles; to thrid.

To form a thread, or spiral rib, on or in; as, to thread a screw or nut.

the connections that link the various parts of an event or argument together; "I couldn't follow his train of thought"; "he lost the thread of his argument"