muller in WordNet English dictionary

1. a heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone
   pestle  muller  pounder 
   
2. a vessel in which wine is mulled
   muller 
   
3. a reflective thinker characterized by quiet contemplation
   muser  muller  ponderer  ruminator