Breadcrumb Home > Dictionary > Index A Arius: Meaning and Definition of Find definitions for: A•ri•us Pronunciation: (u-rī'us, âr'ē-), [key] — n. died a.d. 336, Christian priest at Alexandria: founder of Arianism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arius (Thesaurus) -arium a rivederci* ✖ Related Content Daily Word Quiz: glissade Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language