Definition from Wiktionary, the free dictionary
From cathedral church, from Late Latin ecclēsia cathedrālis (“church having a bishop's seat”), from Ancient Greek καθέδρα (kathedra, “chair of a teacher, throne”), from κατά (kata, “down”) + ἕδρα (hedra, “seat”).
cathedral (plural cathedrals)
- A big church building, central place for some area.
- The principal church of a bishop's diocese which contains an episcopal throne.
principal church of a bishop's diocese