See enlightenment in American Heritage Dictionary 4
(ĕn-lītˈn-mənt)
noun
a. The act or a means of enlightening.
b. The state of being enlightened.
Enlightenment A philosophical movement of the 18th century that emphasized the use of reason to scrutinize previously accepted doctrines and traditions and that brought about many humanitarian reforms. Used with the.
Buddhism & Hinduism A blessed state in which the individual transcends desire and suffering and attains Nirvana.