1. a belief or opinion that goes against the official teachings of a religion, especially Christianity
Usage: religious context
2. an opinion or belief that goes against what is generally accepted or established
Usage: general usage

Examples

• The church condemned his teachings as heresy.
• In medieval times, heresy was punishable by death.
• Her scientific theories were considered heresy by traditional scholars.
• The professor’s radical ideas were dismissed as political heresy.
• Galileo was accused of heresy for supporting the heliocentric model.
• To suggest changing the company’s core values would be heresy to the founders.