The Collaborative International Dictionary of English v.0.48:
Theologian \The`o*lo"gi*an\, n. [Cf. F. th['e]ologien, L. theologus, Gr. ?. See Theology.] A person well versed in theology; a professor of theology or divinity; a divine. [1913 Webster]WordNet (r) 3.0 (2006):
theologian n 1: someone who is learned in theology or who speculates about theology [syn: theologian, theologist, theologizer, theologiser]