Source : Webster's Revised Unabridged Dictionary (1913)

Upholstery \Up*hol"ster*y\, n.
   The articles or goods supplied by upholsterers; the business
   or work of an upholsterer.

Source : WordNet®

upholstery
     n 1: covering (padding and springs and webbing and fabric) on a
          piece of furniture
     2: the craft of upholstering