Definitions

heresy

[her-uh-see] / ˈhɛr ə si /

NOUN

unorthodox opinion, especially in religious matters

Synonyms

STRONGEST

blasphemy fallacy

STRONG

agnosticism apostasy atheism defection disbelief dissent dissidence divergence error heterodoxy iconoclasm impiety infidelity nonconformism nonconformity paganism revisionism schism sectarianism secularism sin

WEAK

misbelief

Antonyms

STRONG

agreement belief harmony

WEAK

orthodoxy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Eventually, science slipped the shackles of heresy and astronomers revolutionized our understanding of Earth’s place in the cosmos.

From The Wall Street Journal • Apr. 23, 2026

Most of the unhappy denizens of Dante’s imagined hell are being eternally tormented for specific moral crimes in categories covering lust, gluttony, greed, anger, heresy, violence, fraud and treachery.

From Salon • Mar. 8, 2026

I realize this is heresy, but I think it’s important to acknowledge the irreducible strangeness of the drama.

From Los Angeles Times • Nov. 4, 2024

But his suggestion that animals think and feel was seen as scientific heresy among many, if not most animal behaviour experts.

From BBC • Jun. 15, 2024

This, in Greenblatt’s world of value investors, counted as heresy.

From "The Big Short" by Michael Lewis

Vocabulary lists containing heresy

Fahrenheit 451

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100 Words to Make You Sound Smart

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World Religions

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