diocesan UK /dʌɪˈɒsɪsən/US /daɪˈɑsɪsən/noun 2adjective 1forms 1 noun2 •The bishop of a diocese. •An inhabitant of a diocese. adjective1 •Pertaining to a diocese.Diocesan bureaucracies were both symptom and cause of this. — 2009 formsdiocesans
