Arian /ˈɛəɹi.ən/noun 5adjective 3forms 3 noun5 •A believer of Arianism, particularly (historical) the official Arian churches lasting to the 7th century. •(historical) A supporter of the Cyrenaic monk Arius and his faction in the 4th-century Church. •Synonym of Aries, a person born under the influence of Aries. •(offensive) Synonym of unitarian, any Christian who denies the Trinity. •(offensive, old-fashioned) Synonym of heretic, any Christian differing from any of the beliefs of the speaker. adjective3 •Of or pertaining to Arius or Arianism.The highways of the East were crowded with Homoousian, and Arian, and Semi-Arian, and Eunomian bishops, who struggled to outstrip each other in the holy race: […]. — 1781 •Of or related to Aries, its nature, and its influence.The Arian nature is to create the idea... — 1917 •(historical) Of or related to Aria, the region around Herat in Afghanistan, particularly in the context of its ancient history. formsArians · more Arian · most Arian