di ‧ o ‧ cese /ˈdaɪəsəs, ˈdaɪəsɪs/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: Greek dioikesis 'management and organization' ]
the area under the control of a ↑ bishop in some Christian churches
—diocesan /daɪˈɒsəs ə n, daɪˈɒsɪs ə n $ -ˈɑː-/ adjective