Relating to the throne or the see of a bishop.

The principal church of an archbishop's/bishop's archdiocese/diocese which contains an episcopal throne. / (loosely or informally) A large or important church building.

(US politics, slang) In certain right-wing conspiracy theories, the mainstream system or establishment of society, held to be liberal or leftist and to be working against the interests of the people or nation.

plural of cathedral

Having a cathedral. / Vaulted like a cathedral.

(Christianity) The cathedral system.

(obsolete) Relating to the chair or office of a teacher.

the principal Roman Catholic church in England

An enclosed precinct surrounding a cathedral.

plural of cathedral close