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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.
[From Latin Monarchiānī, the Monarchians, from monarchia, monarchy; see monarchy.]
Mo•nar•chi•an•ism(məˈnɑr ki əˌnɪz əm)
any of several Christian doctrines in the 2nd and 3rd centuries A.D., emphasizing the unity of God.
Mo•nar′chi•an, adj., n.
a 2nd- and 3rd-century Christian doctrine that maintained that God is a single person as well as a single being. — monarchian, adj.See also: Christianity