I. ec ‧ cle ‧ si ‧ as ‧ tic /ɪˌkliːziˈæstɪk◂/ BrE AmE noun [countable]
formal a priest, usually in the Christian church
II. ec ‧ cle ‧ si ‧ as ‧ ti ‧ cal /ɪˌkliːziˈæstɪk ə l/ BrE AmE ( also ec‧cle‧sias‧tic /-ˈæstɪk/) adjective
[ Date: 1400-1500 ; Language: Late Latin ; Origin: ecclesiasticus , from Greek ekklesia 'group of people gathered together, church' ]
relating to the Christian church or its priests:
ecclesiastical history