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• Unitarianism
  Unitarianism

  noun

  the beliefs, principles, and practices of Unitarians.
• unitarianism
  unitarianism

  noun

  a system of Christian belief that maintains the unipersonality of God, rejects the Trinity and the divinity of Christ, and takes reason, conscience, and character as the criteria of belief and practice

Unitarianism

American  

[yoo-ni-tair-ee-uh-niz-uhm] / ˌyu nɪˈtɛər i əˌnɪz əm /

noun

1. the beliefs, principles, and practices of Unitarians.

2. (lowercase) any system advocating unity or centralization, as in government.

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unitarianism ¹ British  

/ ˌjuːnɪˈtɛərɪəˌnɪzəm /

noun

1. a system of Christian belief that maintains the unipersonality of God, rejects the Trinity and the divinity of Christ, and takes reason, conscience, and character as the criteria of belief and practice

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unitarianism ² British  

/ ˌjuːnɪˈtɛərɪəˌnɪzəm /

noun

1. any unitary system, esp of government

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Etymology

Origin of Unitarianism

unitarian ( def. ) + -ism

Example Sentences

Chesterton was raised in a high-minded Unitarianism whose morals he approved but whose understanding of God he found too thin to support the changes that he, as a man of the left, wanted.

From The Wall Street Journal • Apr. 3, 2026

With a subdued and intellectual form of worship, these churches abandoned theological mysteries like the Trinity in favor of Unitarianism, while Universalist preachers taught rural and working-class Christians that God would save everybody.

From Textbooks • Jan. 18, 2018

But like his father, President John Adams, he migrated over to a more conservative tradition and toward Unitarianism.

From Washington Post • Nov. 16, 2017

They were often people of independent frame of mind, perhaps because of the traditions of non-conformism and Unitarianism that existed in the city.

From BBC • Feb. 12, 2016

Unitarianism was a lenient Christian faith at the center of social reform in England.

From "Charles and Emma: The Darwins' Leap of Faith" by Deborah Heiligman