[trahy-thee-iz-uh
m] 
| belief in three Gods, esp. in the doctrine that the three persons of the Trinity (Father, Son, and Holy Ghost) are three distinct Gods, each an independent center of consciousness and determination. |
| tri·the·ism (trī'thē-ĭz'əm) n. Christianity The belief that the Father, Son, and Holy Spirit are three separate and distinct gods, heretical in orthodox Christianity. tri'the·ist n., tri'the·is'tic, tri'the·is'ti·cal adj. |