1. strict adherence to the basic principles of a religion, ideology, or movement, often rejecting modern interpretations or practices
Usage: often used in religious contexts; can be applied to various ideologies
2. a movement or attitude emphasizing strict, literal interpretation of sacred texts and rejection of modern scientific or secular viewpoints
Usage: historically associated with early 20th-century Protestant Christianity

Examples

• Religious fundamentalism has shaped the beliefs of many communities worldwide.
• Some critics argue that fundamentalism resists necessary social change.
• The fundamentalism of certain groups leads them to reject evolutionary theory.
• Political fundamentalism can prevent compromise and dialogue.
• She studied the rise of fundamentalism in 20th-century America.
• Fundamentalism emphasizes returning to core doctrines and practices.
• The movement's fundamentalism made it difficult to adapt to modern society.