/ Dictionary / Index U Unitarianism: Meaning and Definition of Find definitions for: U•ni•tar•i•an•ism Pronunciation: (y"ni-târ'ē-u-niz"um), [key] — n. the beliefs, principles, and practices of Unitarians. Cf. (l.c.) any system advocating unity or centralization, as in government. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unitarianism (Thesaurus) unitarian Unitarian Universalism Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language