A Christian heresy of the second and third centuries ad that rejected the Old Testament and denied the incarnation of God in Jesus as a human.
The doctrines of a rigorous Christian sect of the 2d and 3d cent. that rejected the Old Testament and all but the writings of Paul in the New Testament.
Origin of marcionism
- After Marcion (died c. ad 160), Pontic merchant and heretic in Rome
From American Heritage Dictionary of the English Language, 5th Edition