ENLIGHTENMENT, noun

1. the act of enlightening.
2. the state of being enlightened: to live in spiritual enlightenment.
3. (usually cap.) Buddhism, Hinduism. prajna.
4. the Enlightenment, a philosophical movement of the 18th century, characterized by belief in the power of human reason and by innovations in political, religious, and educational doctrine.
* Excerpted from the Random House Webster's Unabridged Dictionary 3.0.