- (theology) The monotheistic Christian doctrine that defines God as three divine persons or hypostases: the Father, the Son (Jesus Christ), and the Holy Spirit.
- trinitarian, Trinitarian
- triunitarian, Triunitarian
- tri-unitarian, Tri-unitarian, Tri-Unitarian
- trinity, Trinity
- triunity, Triunity
- tri-unity, Tri-unity, Tri-Unity
doctrine of three persons or hypostases in one Godhead