One who advocates or resorts to measures beyond the norm, especially in politics.(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 "extremist" in a sentence
"Barry Goldwater even embraced the title extremist ( "extremism in the defense of liberty is no vice"), George McGovern's anti-war crusade offered an unapologetically leftist platform, and Walter Mondale proudly promised in his convention speech that he would raise the nation's taxes."
"The term extremist is NOT what the left supports … which is why the left works against the right because of all the extremist types in the republican party … but they call themselves christians instead of muslims … what ever BS … they are biggoted facists."
"The department cites threatening rhetoric from what it calls extremist groups."