ear in WordNet English dictionary

1. the externally visible cartilaginous structure of the external ear
   auricle  pinna  ear 
   
2. fruiting spike of a cereal plant especially corn
   ear  spike  capitulum 
   
3. the sense organ for hearing and equilibrium
   ear 
   
4. good hearing
   "he had a keen ear"; "a good ear for pitch"
   ear 
   
5. attention to what is said
   "he tried to get her ear"
   ear