Source : Webster's Revised Unabridged Dictionary (1913)

Muchness \Much"ness\, n.
   Greatness; extent. [Obs. or Colloq.]

         The quantity and muchness of time which it filcheth.
                                                  --W. Whately.

   {Much of a muchness}, much the same. [Colloq.] ``Men's men;
      gentle or simple, they're much of a muchness.'' --G.
      Eliot.