- A person who advocates or resorts to measures beyond the norm, especially in politics.
- One who goes to extremes; a supporter of extreme doctrines or practice.
- A supporter of extreme doctrines or practice; one who holds extreme opinions.
- a person who holds <xref>extreme</xref> <xref>views</xref>, especially one who <xref>advocates</xref> such views; a <xref>radical</xref> or <xref>fanatic</xref>
- holding extreme views, especially on a <xref>political</xref> subject
- of, or relating to <xref>extremism</xref>
- (used of opinions and actions) far beyond the norm
- a person who holds extreme views