'Hierarch' definitions:

Definition of 'hierarch'

noun

A person who holds a high position in a hierarchy

noun

A senior clergyman and dignitary [syn: archpriest, hierarch, high priest, prelate, primate]

From: GCIDE

Hierarch \Hi"er*arch\ (h[imac]"[~e]r*[aum]rk`), n. [LL. hierarcha, Gr. ?; "iero`s sacred (akin to Skr. ishiras vigorous, fresh, blooming) + ? leader, ruler, fr. ? to lead, rule: cf. F. hi['e]rarque.] One who has high and controlling authority in sacred things; the chief of a sacred order; as, princely hierarchs. --Milton. Hierarchal