Entry 2 senses · 2 variants Webster, 1913 Ecclesiastic /ĭ-klē'zē-ăsʹtĭk/ · Ec·cle·si·as·tic · IPA /ɪˌkliː.ziˈæs.tɪk/ a. n. 01 a. Of or pertaining to the church. See Ecclesiastical. 1. Of or pertaining to the church. See Ecclesiastical. See: Ecclesiastical 02 n. A person in holy orders, or consecrated to the service of the church and the ministry of religion; a clergyman; a priest. 1. A person in holy orders, or consecrated to the service of the church and the ministry of religion; a clergyman; a priest. “From a humble ecclesiastic, he was subsequently preferred to the highest dignities of the church.” — Prescott.