A person who believes in the doctrine of the Trinity, which is the Christian belief that God exists as three persons in one essence: the Father, the Son, and the Holy Spirit.

As a Trinitarian, she firmly believes in the unity of the Father, Son, and Holy Spirit.

A member of the religious order known as the Trinitarians, founded in the 12th century to ransom Christian captives.

The Trinitarian dedicated his life to helping those in need, following the mission of his order.

Trinitarianadjective

Relating to the Christian doctrine of the Trinity, which holds that God exists as three persons in one essence: the Father, the Son, and the Holy Spirit.

The church's trinitarian beliefs are central to its teachings and practices.

Involving or consisting of three parts or elements.

The trinitarian structure of the novel reflects the interconnectedness of its three main characters.