trinitarian
1 of 2adjective
trin·i·tar·i·an ˌtri-nə-ˈter-ē-ən 
1
capitalized : of or relating to the Trinity, the doctrine of the Trinity, or adherents to that doctrine
2
: having three parts or aspects : threefold
Trinitarian
2 of 2noun
1
: a member of a religious teaching and nursing order for men founded in France in 1198 by John of Matha and Philip of Valois
2
: one who subscribes to the doctrine of the Trinity
Trinitarianism
ˌtri-nə-ˈter-ē-ə-ˌni-zəm
noun 
Example Sentences
Recent Examples on the Web
Barton Swaim, WSJ, 23 Dec. 2018
Adjective
But these works are neither more nor less committed to trinitarian Christianity than Blake’s are to his eccentric spiritualism or Shelley’s to his atheism. Barton Swaim, WSJ, 23 Dec. 2018 Word History
First Known Use
Adjective
1628, in the meaning defined at sense 1
Noun
1628, in the meaning defined at sense 1