extremist /ɪkˈstɹiːmɪst/adjective 2noun 1forms 3 adjective2 •Holding extreme views, especially on a political or religious subject.There are some minor extremist movements that are antiforeigner. — 2006 •Of or relating to extremism. noun1 •A person who holds extreme views, especially one who advocates such views; a radical or fanatic.In Urif, extremists spray painted “Death to Arabs” on shipping containers belonging to a local resident and the local quarry was tagged with the words “Fight the enemy.” — 2018 formsextremists · more extremist · most extremist