Source : Webster's Revised Unabridged Dictionary (1913)

   {Dimension lumber}, {Dimension scantling}, or {Dimension
   stock} (Carp.), lumber for building, etc., cut to the sizes
      usually in demand, or to special sizes as ordered.

   {Dimension stone}, stone delivered from the quarry rough, but
      brought to such sizes as are requisite for cutting to
      dimensions given.