Source : Webster's Revised Unabridged Dictionary (1913)

Upholder \Up*hold"er\, n. [Up + holder. Cf. {Upholsterer}.]
   1. A broker or auctioneer; a tradesman. [Obs.]

   2. An undertaker, or provider for funerals. [Obs.]

            The upholder, rueful harbinger of death. --Gay.

   3. An upholsterer. [Obs.]

   4. One who, or that which, upholds; a supporter; a defender;
      a sustainer.

Source : WordNet®

upholder
     n : someone who upholds or maintains; "firm upholders of
         tradition"; "they are sustainers of the idea of
         democracy" [syn: {maintainer}, {sustainer}]