Extremism, especially in politics or government; radicalism. (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.
Use "ultraism" in a sentence
"They do want the ultimate control of life and death over others dressed up in social conscience and economic ultraism."
"Were it not for its ultraism in politics, we should regard it as the most valuable journal of the day."
"Or is his maximum ultraism that which makes his message succeed?"