Source : Webster's Revised Unabridged Dictionary (1913)

Upholster \Up*hol"ster\, v. t. [See {Upholsterer}.]
   To furnish (rooms, carriages, bedsteads, chairs, etc.) with
   hangings, coverings, cushions, etc.; to adorn with
   furnishings in cloth, velvet, silk, etc.; as, to upholster a
   couch; to upholster a room with curtains.

Upholster \Up*hol"ster\, n.
   1. A broker. [Obs.] --Caxton.

   2. An upholsterer. [Obs.] --Strype.

Source : WordNet®

upholster
     v : provide furniture with padding, springs, webbing, and covers