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
One who, or that which, molds or forms into shape; specifically (Founding), one skilled in the art of making molds for castings
mould·er moulders mouldering mouldered in AM, use molder If something is mouldering, it is decaying slowly where it has been left. one of your scripts that's been mouldering under the bed for ages It is clear that such ideas will be left to moulder. the empty, mouldering old house. to decay gradually