What does "illuminate" mean?

Illuminate: To light up; to decorate with artificial lights, as a building or city, in token of rejoicing or respect.

Additional senses

  1. 2.To adorn, as a book or page with borders, initial letters, or miniature pictures in colors and gold, as was done in manuscripts of the Middle Ages.
  2. 3.To make plain or clear; to dispel the obscurity to by knowledge or reason; to explain; to elucidate; as, to illuminate a text, a problem, or a duty.
  3. 4.To light up in token or rejoicing.
  4. 5.Enlightened. Bp. Hall.
  5. 6.One who enlightened; esp., a pretender to extraordinary light and knowledge.

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