Definitions

1. noun

A person who holds or expresses opinions that are considered to be at odds with the beliefs of a particular group or institution, especially a person who rejects or denies a particular religion or its dogma.

“The inquisition accused the scholar of being a heretic and sentenced him to imprisonment.”

2. noun

A person who rejects or doubts a particular principle, theory, or practice, especially a scientific or philosophical one.

“The physicist was considered a heretic in his field for proposing a new theory that contradicted established knowledge.”

3. adjective

Relating to or characteristic of a heretic.

“The heretic ideas were considered taboo in the conservative community.”