fun ‧ da ‧ men ‧ tal ‧ ist /ˌfʌndəˈment ə ləst, ˌfʌndəˈment ə lɪst/ BrE AmE noun [countable]
1 . someone who follows religious laws very strictly:
Muslim fundamentalists
2 . a Christian who believes that everything in the Bible is completely and actually true
—fundamentalism noun [uncountable]
—fundamentalist adjective :
a fundamentalist doctrine