Unitarian

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An adherent of Unitarian Universalism.
2. n. A monotheist who is not a Christian.
3. n. A Christian who is not a Trinitarian.

Century Dictionary and Cyclopedia

1. Of or relating to a unit or unity, or to one thing or plan or party; unitary.
2. [capitalized] Of or pertaining to the Unitarians or their doctrines.
3. n. [capitalized] One who maintains the unipersonality of the Deity; one who denies the doctrine of the Trinity; specifically, a member of a Christian body founded upon the doctrine of unipersonality. The churches of the Unitarian body are congregational in government, and independent of one another. They possess no common symbol of doctrine, and differ widely among themselves. They may be divided into two schools of thought, though there is no sharply defined line between them. The conservative Unitarians hold doctrinal views in many respects resembling those of the orthodox Trinitarians, except in their denial of the tripersonality of the Deity. They accept Christ as the manifestation of God in a human life, though they do not regard him as equal in character or power with the Father. They believe in the work of the Holy Spirit, though they do not generally regard him as a distinct personality. They believe in the Scriptures as containing a divine revelation, and in the miracles as an attestation of that revelation. They hold a doctrine of inherited depravity, but not in guilt, except as the result of a personal choice; to a doctrine of future retribution, though not generally to its endlessness; to an atonement by Christ for the sins of mankind, but not to the expiatory theory of that atonement (see atonement); and to the necessity of regeneration wrought by the Spirit of God, but only with the cooperation of man; in what is called “irresistible grace” they do not believe. The doctrines of election, reprobation, foreordination, and decrees, as those doctrines are interpreted in the Calvinistic symbols, they repudiate as unscriptural and irrational. The radical school of Unitarians hold views not materially varying from deism. They reverence Christ as a peculiarly holy man, with whom the Spirit of God abode, but in no sense other than that in which he abides with every truly holy man. They respect the Bible as a work of transcendent moral genius, but in no other sense inspired. They do not believe in the miracles, and either explain them as the product of natural causes or regard the accounts of them as mythical and traditionary. They do not accept the doctrines of atonement and regeneration, and do not employ the terms; and they both attribute sin to defective education, intellectual and moral, and depend upon a right education to redeem the world from its effects. The Unitarian movement in the United States was developed chiefly in New England about the beginning of the nineteenth century, under the lead of Dr. Channing. Many of the oldest Congregational churches in New England passed under Unitarian control, and the “American Unitarian Association” was formed in 1825. Outside of the denomination proper, Unitarian views are held by the Hicksite Friends, some Universalists, and by individuals in other denominations. See Arian, Socinianism.
4. n. A monotheist; a believer in one God, as opposed to a polytheist, or a believer in many gods. In this sense it is applicable to all Christians, Jews, and Mohammedans, as well as deists.
5. n. A monist.
6. n. One who advocates any unitary system; an advocate of unity; in politics, an advocate of centralization.

Wiktionary

1. n. A Christian who does not believe in the traditional doctrine of the Trinity.
2. n. A follower of Unitarian Universalism; or a member of a Unitarian Universalist Church in North America who adhered to, or identifies with, the Unitarian part of that church prior to consolidation in 1961.
3. n. rare A Muslim, Jew or other kind of monotheist who is not a Christian.
4. n. A member of a certain political movement, especially the Unitarios of nineteenth century Argentina (known as the Unitarian Party in English).
5. adj. Pertaining to Unitarianism

GNU Webster's 1913

1. n. (Theol.) One who denies the doctrine of the Trinity, believing that God exists only in one person; a unipersonalist; also, one of a denomination of Christians holding this belief.
2. n. One who rejects the principle of dualism.
3. n. rare A monotheist.
4. adj. Of or pertaining to Unitarians, or their doctrines.

WordNet 3.0

1. n. adherent of Unitarianism
2. adj. of or relating to or characterizing Unitarianism