Source : Webster's Revised Unabridged Dictionary (1913)

Scaffold \Scaf"fold\, v. t.
   To furnish or uphold with a scaffold.

Scaffold \Scaf"fold\, n. [OF. eschafault, eschafaut, escafaut,
   escadafaut, F. ['e]chafaud; probably originally the same word
   as E. & F. catafalque, It. catafalco. See {Catafalque}.]
   1. A temporary structure of timber, boards, etc., for various
      purposes, as for supporting workmen and materials in
      building, for exhibiting a spectacle upon, for holding the
      spectators at a show, etc.

            Pardon, gentles all, The flat, unraised spirits that
            have dared On this unworthy scaffold to bring forth
            So great an object.                   --Shak.

   2. Specifically, a stage or elevated platform for the
      execution of a criminal; as, to die on the scaffold.

            That a scaffold of execution should grow a scaffold
            of coronation.                        --Sir P.
                                                  Sidney.

   3. (Metal.) An accumulation of adherent, partly fused
      material forming a shelf, or dome-shaped obstruction,
      above the tuy[`e]res in a blast furnace.

Source : WordNet®

scaffold
     n 1: a platform from which criminals are executed (hanged or
          beheaded)
     2: a temporary arrangement erected around a building for
        convenience of workers
     v : provide with a scaffold for support; "scaffold the building
         before painting it"