any of several doctrines of the Christian church in the 2nd and 3rd centuries a.d., emphasizing the unity of God by maintaining that the Father, the Son, and the Holy Ghost are three manifestations or aspects of God.
Origin of Monarchianism
1835–45;Monarchian (< Late Latinmonarchiānus; see monarchy, -an) + -ism
Related formsMo·nar·chi·an, adjective, nounMo·nar·chi·an·ist, noun
