heretical

/həˈrɛtɪkəl/
adjective
  1. Relating to or holding beliefs that go against the official teachings of a religion, especially Christianity.
    • The council issued a statement listing several heretical ideas that were spreading among the faithful.
    • Her heretical views on salvation caused a major controversy in the congregation.
    • The bishop condemned the book as heretical and banned it from church libraries.
  2. Contrary to or critical of widely accepted opinions, standards, or practices in any field.
    • His heretical approach to teaching math actually helped struggling students learn faster.
    • The architect's heretical design rejected all traditional rules of building.
    • It was once considered heretical to suggest that the Earth orbits the Sun.