Wordnet 3.0
NOUN (1)
1. 
 a movement in Europe from about 1650 until 1800 that advocated the use of reason and individualism instead of tradition and established doctrine; 
- Example: "the Enlightenment brought about many humanitarian reforms"[syn: Enlightenment, Age of Reason]
WordNet (r) 3.0 (2006):
Age of Reason
    n 1: a movement in Europe from about 1650 until 1800 that
         advocated the use of reason and individualism instead of
         tradition and established doctrine; "the Enlightenment
         brought about many humanitarian reforms" [syn:
         Enlightenment, Age of Reason]