Definition of Marcionism
: the doctrinal system of a sect of the second and third centuries a.d. accepting some parts of the New Testament but denying Christ's corporality and humanity and condemning the Creator God of the Old Testament
Marcioniteplay \-ˌnīt\ noun
Origin and Etymology of marcionism
Marcion 2d century a.d. Christian Gnostic
First Known Use: 1868
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