lemon in WordNet English dictionary

1. a small evergreen tree that originated in Asia but is widely cultivated for its fruit
   lemon  lemon tree  Citrus limon 
   
2. a strong yellow color
   gamboge  lemon  lemon yellow  maize 
   
3. an artifact (especially an automobile) that is defective or unsatisfactory
   lemon  stinker 
   
4. a distinctive tart flavor characteristic of lemons
   lemon 
   
5. yellow oval fruit with juicy acidic flesh
   lemon