uni·​tar·​i·​an | \ ˌyü-nə-ˈter-ē-ən How to pronounce unitarian (audio) \

Definition of unitarian

1a often capitalized : one who believes that the deity exists only in one person
b capitalized : a member of a denomination that stresses individual freedom of belief, the free use of reason in religion, a united world community, and liberal social action
2 : an advocate of unity or a unitary system

Other Words from unitarian

unitarian adjective, often capitalized
unitarianism \ ˌyü-​nə-​ˈter-​ē-​ə-​ˌni-​zəm How to pronounce unitarianism (audio) \ noun, often capitalized

First Known Use of unitarian

circa 1651, in the meaning defined at sense 1a

History and Etymology for unitarian

New Latin unitarius, from Latin unitas unity

Keep scrolling for more

Learn More about unitarian

Time Traveler for unitarian

Time Traveler

The first known use of unitarian was circa 1651

See more words from the same year

Statistics for unitarian

Cite this Entry

“Unitarian.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/unitarian. Accessed 28 January 2020.

More from Merriam-Webster on unitarian

Britannica English: Translation of unitarian for Arabic Speakers

Comments on unitarian

What made you want to look up unitarian? Please tell us where you read or heard it (including the quote, if possible).


showing steady, earnest care and effort

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman tablet
  • What did focus mean in Latin?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!