antiradicalism en · NOUN
Etymology
From anti- + radicalism.
Meanings
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(uncountable) Opposition to radical ideologies.
Wartime antiradicalism crested in a postwar Red Scare. (Communists were called “reds” because of the red flag favored by revolutionary organizations.)
2010, Paul S. Boyer; Clifford E. Clark, Jr.; Joseph F. Kett, The Enduring Vision Since 1865, page 691: