Source : Webster's Revised Unabridged Dictionary (1913)

Irvingite \Ir"ving*ite\, n. (Eccl.)
   The common designation of one a sect founded by the Rev.
   Edward Irving (about 1830), who call themselves the Catholic
   Apostolic Church. They are highly ritualistic in worship,
   have an elaborate hierarchy of apostles, prophets, etc., and
   look for the speedy coming of Christ.