Entry 2 senses · 2 variants Webster, 1913 Pontifician · Pon·ti·fi·cian · IPA a. n. 01 a. Of or pertaining to the pontiff or pope. 1. Of or pertaining to the pontiff or pope.[Obs.] 02 n. One who adheres to the pope or papacy; a papist. 1. One who adheres to the pope or papacy; a papist.[Obs.]