Source : Webster's Revised Unabridged Dictionary (1913)

Molder \Mold"er\, Moulder \Mould"er\, v. t.
   To turn to dust; to cause to crumble; to cause to waste away.

         [Time's] gradual touch Has moldered into beauty many a
         tower.                                   --Mason.

Molder \Mold"er\, Moulder \Mould"er\, n.
   One who, or that which, molds or forms into shape;
   specifically (Founding), one skilled in the art of making
   molds for castings.

Molder \Mold"er\, Moulder \Mould"er\, v. i. [imp. & p. p.
   {Moldered}or {Mouldered}; p. pr. & vb. n. {Moldering} or
   {Mouldering}.] [From {Mold} fine soft earth: cf. Prov. G.
   multern.]
   To crumble into small particles; to turn to dust by natural
   decay; to lose form, or waste away, by a gradual separation
   of the component particles, without the presence of water; to
   crumble away.

         The moldering of earth in frosts and sun. --Bacon.

         When statues molder, and when arches fall. --Prior.

         If he had sat still, the enemy's army would have
         moldered to nothing.                     --Clarendon.

Mould \Mould\ (m[=o]ld), Moulder \Mould"er\, Mouldy \Mould"y\,
   etc.
   See {Mold}, {Molder}, {Moldy}, etc.

Source : WordNet®

moulder
     v : break down; "The bodies decomposed in the heat" [syn: {decompose},
          {rot}, {molder}]