Entry 1 sense Webster, 1913 Theologian /thēˌ-əl-ōj'-ē-ən/ · The·o·lo·gi·an · IPA /ˌθi.əˈloʊd͡ʒən/ 01 n. A person well versed in theology; a professor of theology or divinity; a divine. 1. A person well versed in theology; a professor of theology or divinity; a divine.