Trīn'ī-tā'ri-an1, a.
a. [Fr. trinitaire. See TRINITY.] Of, or pertaining to, the Trinity, or to the doctrine of the Trinity.
2 entries under this word
a. [Fr. trinitaire. See TRINITY.] Of, or pertaining to, the Trinity, or to the doctrine of the Trinity.
n. 1. One who believes the doctrine of the Trinity. 2. (Eccl. Hist.) One of a religious order who made it their business to redeem Christians from Turks or infidels.