Ex Cathedra
Defined in 2 dictionaries — Black's (1910), Black's (1891)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
From the chair. Originally applied to the decisions of the popes from their cathedra, or chair. Hence, authoritative ; having the weight of authority.
A Dictionary of Law
Henry Campbell Black · 1891
From the chair. Originally applied to the decisions of the popes from their cvtkedra, or chair. Hence, authoritative; having the weight ef authority.