Definition of heretic
1
religion
: a person who differs in opinion from established religious dogma (see dogma sense 2)
especially
: a baptized member of the Roman Catholic Church who refuses to acknowledge or accept a revealed truth
The church regards them as heretics.
2
: one who differs in opinion from an accepted belief or doctrine : nonconformist
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Merriam-Webster unabridged
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Time Traveler for heretic
The first known use of heretic was in the 14th century
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