1. a person who believes in the strict, literal interpretation of religious texts and adheres to traditional religious principles
Usage: often used in religious contexts; can refer to adherents of various faiths
2. a person who holds extreme or uncompromising views in any area and refuses to accept change or alternative perspectives
Usage: extended usage beyond religion

1. relating to or characteristic of fundamentalism; based on strict adherence to basic principles

Examples

• Religious fundamentalists interpret sacred texts word-for-word without considering historical context.
• The fundamentalist approach to grammar emphasizes strict adherence to traditional rules.
• Some fundamentalist groups reject modern technology and scientific advances.
• She was criticized for her fundamentalist views on education policy.
• Fundamentalist Christians believe in the literal truth of the Bible.
• The organization took a fundamentalist stance, refusing to compromise on any of its core principles.
• His fundamentalist interpretation of the law left no room for exceptions or flexibility.