Source : Webster's Revised Unabridged Dictionary (1913)

Sley \Sley\, n. (Weaving)
   The number of ends per inch in the cloth, provided each dent
   in the reed in which it was made contained as equal number of
   ends. --E. Whitworth.

Sley \Sley\, n. [AS. sl?, fr. sle['a]n to strike. See {Slay}, v.
   t.]
   1. A weaver's reed. [Spelt also {slaie}.]

   2. A guideway in a knitting machine. --Knight.

Sley \Sley\, v. t.
   To separate or part the threads of, and arrange them in a
   reed; -- a term used by weavers. See {Sleave}, and {Sleid}.