cathedra Meaning, Definition & Usage

  1. noun a throne that is the official chair of a bishop
    bishop's throne.

WordNet

Cath"e*dra noun
Etymology
L., fr. Gr. seat. See Chair.
Definitions
  1. The official chair or throne of a bishop, or of any person in high authority.
    The Vatican Council declares that the Pope, is infallible "when he speaks ex cathedra." Addis & Arnold's Cath. Dict.

Webster 1913