Adjective extremist has 1 sense
  1. extremist, radical, ultra - (used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative"
    Antonym: moderate (indirect, via immoderate)
,Noun extremist has 1 sense
  1. extremist - a person who holds extreme views
    --1 is a kind of
    radical
,
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