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English definition of “heresy”

heresy

noun [C/U]    /ˈher·ə·si/
a belief opposed to the official belief of a church and that is considered wrong, or the condition of having such beliefs: [U] fig. The concept of college athletes being paid to play sports was received as nothing short of heresy (= unusual opinions considered completely wrong).
(Definition of heresy noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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