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  • unitarian
    unitarian
    noun
    a person who maintains that God is one being, rejecting the doctrine of the Trinity.
  • Unitarian
    Unitarian
    noun
    theol a person who believes that God is one being and rejects the doctrine of the Trinity

unitarian

American  
[yoo-ni-tair-ee-uhn] / ˌyu nɪˈtɛər i ən /

noun

  1. a person who maintains that God is one being, rejecting the doctrine of the Trinity.

  2. (initial capital letter) 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.

  3. an advocate of unity or centralization, as in government.


adjective

  1. (initial capital letter) pertaining to the Unitarians or their doctrines; accepting Unitarianism; belonging to the Unitarians.

  2. unitary.

Unitarian 1 British  
/ ˌjuːnɪˈtɛərɪən /

noun

  1. theol a person who believes that God is one being and rejects the doctrine of the Trinity

  2. ecclesiast an upholder of Unitarianism, esp a member of the Church ( Unitarian Church ) that embodies this system of belief

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. of or relating to Unitarians or Unitarianism

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
unitarian 2 British  
/ ˌjuːnɪˈtɛərɪən /

noun

  1. a supporter of unity or centralization

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. of or relating to unity or centralization

  2. another word for unitary

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of unitarian

1680–90; < New Latin ūnitāri ( us ) ( Latin ūnit ( ās ) unity + -ārius -ary ) + -an

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In a series of cases over the past 15 years, the Supreme Court has moved in an unambiguously unitarian, pro-presidential direction.

From Salon • Oct. 8, 2025

All of the grownups belonged to churches, except for one wiseguy who described himself as a lapsed unitarian.

From Time • Sep. 26, 2014

Sorensen evinced a Midwestern sensibility, a unitarian compassion and an unmatched, razor-sharp wit.

From Time • Nov. 19, 2010

‘I am constantly attended by a medical man,’ resumed the pelisse wearer; ‘I have been a shocking unitarian for some time—I, indeed, have had very little peace since the death of Mr. Bloss.’

From Sketches by Boz, illustrative of everyday life and every-day people by Dickens, Charles

It was produced at once by the general spirit of the time and by the unitarian ideas peculiar to the Germans.

From The Recollections of Alexis de Tocqueville by Tocqueville, Alexis de

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