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1. The quality or amount of light; the effect and arrangement of lights
   - light, lighting
    
2. The luminous flux incident on a unit area
   - illuminance
    
3. The degree of visibility of your environment
    
4. An interpretation that removes obstacles to understanding
   "the professor's illumination helped her to understand the textbook";
   - clarification, elucidation, éclaircissement [literary]
    
5. (Middle Ages) painting or drawing included in a book (especially in illuminated medieval manuscripts)
   - miniature
    
6. A condition of spiritual awareness; divine illumination
   "follow God's illumination";
   - light

Derived forms: illuminations

Type of: brightness, brightness level, condition, interpretation, light, luminance, luminosity, luminousness, painting, picture, state, status

Encyclopedia: Illumination