(ˈ)ärch, (ˈ)ȧch+|- noun
Etymology: Middle English erchebishop, archebishop, from Old English ærcebiscop, arcebiscop, from Late Latin archiepiscopus, from Late Greek archiepiskopos, from Greek archi- + episkopos bishop — more at bishop
: a chief bishop : a prelate at the head of an ecclesiastical province or one of equivalent honorary rank with duties and dignities variously comprised in the titles of exarch, patriarch, metropolitan, or primate