1. An Islamic revivalist movement, often characterized by moral conservatism, literalism, and the attempt to implement Islamic values in all spheres of life.
2. The religious faith, principles, or cause of Islam.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.