n. - The principal church in a diocese, so called because in it the bishop has his official chair (Cathedra) or throne.
a. - Pertaining to the head church of a diocese; as, a cathedral church; cathedral service.
a. - Emanating from the chair of office, as of a pope or bishop; official; authoritative.
a. - Resembling the aisles of a cathedral; as, cathedral walks.