1. n. The act of illuminating.
  2. n. The state of being illuminated.
  3. n. A source of light.
  4. n. Decorative lighting.
  5. n. Spiritual or intellectual enlightenment.
  6. n. Clarification; elucidation.
  7. n. The art or act of decorating a text, page, or initial letter with ornamental designs, miniatures, or lettering.
  8. n. An example of this art.
  9. n. Physics The luminous flux per unit area at any point on a surface exposed to incident light. Also called illuminance.