Definify.com
Webster 1828 Edition
Thred
THRED
, n.1.
  A very small twist of flax, wool, cotton, silk or other fibrous substance, drawn out to considerable length.2.
  The filament of a flower.3.
  The filament of any fibrous substance, as of bark.4.
  A fine filament or line of gold or silver.5.
  Air-threads,the fine white filaments which are seen floating in the air in summer, the production of spiders.6.
  Something continued in a long course or tenor; as the thread of a discourse.7.
  The prominent spiral part of a screw.