Definition of "radicalism" []

• The doctrines or practices of radicals. (noun)
• The quality of being radical. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "CIA COUNTERTERRORISM CENTER: The term radicalism really isn't tied so much to economic circumstances."
• "Israeli ambassador to South Africa Uri Oren on Monday condemned what he described as radicalism and extremism by Muslims during a protest in Pretoria last week."
• "I am particularly interested to observe that the men who cry out most loudly against what they call radicalism are the men who find that their private game in politics is being spoiled."