This is the 9225th most frequent Russian word.
соборная
"Соборная" means "cathedral" when used as an adjective or relates to "conciliar" (synodal, assembly-based) in a broader context.
In this sentence, 'соборная' acts as an adjective describing the square, emphasizing its association with a cathedral.
Соборная площадь была заполнена людьми.
The cathedral square was filled with people.
Here, 'соборная' refers to the tradition related to councils or assemblies, denoting communal or collective aspects.
Соборная традиция объединяет людей в вере.
The conciliar tradition unites people in faith.
'Соборная' describes the chapel, linking it directly to a cathedral setting or religious institution.