Source : Webster's Revised Unabridged Dictionary (1913)

Dimity \Dim"i*ty\, n. [Prob. fr. Gr. ? of double thread, dimity;
   di- = di`s- twice + ? a thread of the warp; prob. through D.
   diemet, of F. dimite, d['e]mitte. Cf. {Samite}.]
   A cotton fabric employed for hangings and furniture
   coverings, and formerly used for women's under-garments. It
   is of many patterns, both plain and twilled, and occasionally
   is printed in colors.

Source : WordNet®

dimity
     n : a strong cotton fabric with a raised pattern; used for
         bedcovers and curtains