/ Dictionary / Index A Arianism: Meaning and Definition of Find definitions for: Ar•i•an•ism Pronunciation: (âr'ē-u-niz"um, ar'-), [key] — n. Theol. the doctrine, taught by Arius, that Christ the Son was not consubstantial with God the Father. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arianism (Thesaurus) Ariane Arica Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language