The Greek word meaning "seat " A cathedra is special sanctuary chair only used by a bishop The chair remains empty except during bishop's visitations and serves as a visible reminder that the parish priest represents the bishop, and that the bishop is the spiritual head of the diocese
The chair on which the bishop sits It is located in the chancel, often centered behind the high altar
the special chair that a bishop sits in during a church service: The Bishop's Cathedra The cathedra is sometimes moved to a prominent place for special occasions--as for the conferring of honorary degrees