The Collaborative International Dictionary
pillarist
Stylite \Sty"lite\, n. [Gr. ?, fr. ? a pillar.] (Eccl. Hist.) One of a sect of anchorites in the early church, who lived on the tops of pillars for the exercise of their patience; -- called also pillarist and pillar saint.
Wiktionary
pillarist
n. (context historical Christianity English) A stylite.