The word cathedral comes from a greek what does that mean?

The word "cathedral" comes from the Greek word "kathedra", which means "seat". This is because, in the early Christian church, the bishop's chair (or cathedra) was placed in the main church of a diocese, which was known as the "cathedral church". Over time, the term "cathedral" came to be used to refer to any large and important church, regardless of whether or not it was the seat of a bishop.