Any of several Christian doctrines of the second and third centuries ad that attempted to maintain monotheism and the unity of the Godhead, thereby denying the independent hypostasis of God the Son. Monarchianism was condemned as heretical by the Christian church in the fourth century.
The doctrine of several 2d- and 3d-cent. Christian sects that denied the Trinity altogether or denied the equality of the three persons of the Trinity.
Origin of monarchianism
From Latin Monarchiānīthe Monarchiansfrommonarchiamonarchymonarchy
American Heritage Dictionary of the English Language, 5th Edition
Monarchianism Sentence Examples
It is usual to speak of two kinds of monarchianism - the dynamistic and the modalistic, though the distinction cannot be carried through without some straining of the texts.
Modalistic monarchianism, conceiving that the whole fullness of the Godhead dwelt in Christ, took exception to the "subordinatianism" of some Church writers, and maintained that the names Father and Son were only two different designations of the same subject, the one God, who "with reference to the relations in which He had previously stood to the world is called the Father, but in reference to His appearance in humanity is called the Son."