Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- the opinions, principles, etc. of those who are extreme; extremism
- an instance of this
Origin: ultra- plush -ism
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Extremism, especially in politics or government; radicalism.
- ulˈtra·ist noun