1. opposed to or rejecting reason, logic, or rational thought
Usage: formal; often used in philosophical or critical contexts
2. deliberately or actively working against rationalism or rational principles
Usage: formal; used in philosophy and cultural criticism

Examples

• The antirational movement in art rejected strict adherence to logic and embraced emotion and intuition.
• Some critics argue that superstition is fundamentally antirational.
• The philosopher challenged what she saw as antirational biases in traditional thinking.
• His antirational approach to decision-making often led to unexpected but creative solutions.
• The antirational elements of the narrative made it difficult for readers to follow a clear plot.
• She accused the regime of promoting antirational propaganda to control the population.