Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

moldering
     adj : becoming rotten; "a field covered with thousands of
           decomposing bodies"; "John Brown's body lies
           a-moldering in the grave" [syn: {decomposing}, {mouldering}]