illumination in WordNet English dictionary

1. an interpretation that removes obstacles to understanding
   "the professor's clarification helped her to understand the textbook"
   clarification  elucidation  illumination 
   
2. the luminous flux incident on a unit area
   illuminance  illumination 
   
3. painting or drawing included in a book (especially in illuminated medieval manuscripts)
   miniature  illumination 
   
4. the degree of visibility of your environment
   illumination 
   
5. a condition of spiritual awareness; divine illumination
   "follow God's light"
   light  illumination