theology |θēˈ■ləjē| noun ( pl. -gies) the study of the nature of God and religious belief. ■ religious beliefs and theory when systematically developed : in Christian theology, God comes to be conceived as Father and Son | a willingness to tolerate new theologies. DERIVATIVES theologist |-jist| noun ORIGIN late Middle English (originally applying only to Christianity): from French th■ologie, from Latin theologia, from Greek, from theos ■god■ + -logia (see -logy ).