ultraism

noun
ul·​tra·​ism | \ˈəl-trə-ˌi-zəm \

Definition of ultraism 

1 : the principles of those who advocate extreme measures (such as radicalism)

2 : an instance or example of radicalism

Other Words from ultraism

ultraist \ ˈəl-​trə-​ist \ adjective or noun
ultraistic \ ˌəl-​trə-​ˈi-​stik \ adjective

First Known Use of ultraism

1821, in the meaning defined at sense 1

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The first known use of ultraism was in 1821

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