/yooh'ni tair"ee euhn/ , n.
1. a person who maintains that God is one being, rejecting the doctrine of the Trinity.
2. ( cap. ) a member of a liberal religious denomination founded upon the doctrine that God is one being, and giving each congregation complete control over its affairs. Cf. Unitarian Universalism .
3. an advocate of unity or centralization, as in government.
adj.
4. ( cap. ) pertaining to the Unitarians or their doctrines; accepting Unitarianism; belonging to the Unitarians.
5. unitary.
[ 1680-90; unitari ( us ) (L unit ( as ) UNITY + -arius -ARY) + -AN ]