What is heresy meaning?

Heresy is an opinion or doctrine that goes against established beliefs or teachings, especially those of a religious or philosophical nature. It is often seen as a deviation from the orthodox or accepted beliefs of a particular community. Heresy can lead to accusations of blasphemy, apostasy, and other religious and moral offenses. Many historical figures, including Galileo and Joan of Arc, were accused of heresy. Today, the term is used to describe any belief or practice that is outside of the mainstream or widely accepted.