Definitions:

1. A follower of Sabellius, who maintained that there is but one person in the Godhead, and that the Son and the Holy Spirit are only different powers, operations, or offices of the one God and Father. NOUN
   • The Sabellian heresy denied the distinct personalities within the Trinity.
2. An extinct Osco-Umbrian language of ancient Italy. NOUN
   • The Umbrian-Sabellian tribes had the same phonetic peculiarity as the Celts.
3. Pertaining to the doctrines or tenents of Sabellius. ADJECTIVE
   • The Sabellian doctrine was based on a misunderstanding of the nature of God.

Synonyms:

• osco-umbrian
• sabellianism
• southern italian