Mandean adj 1: of or relating to the Mandaean people or their language or culture [syn: {Mandaean}, {Mandean}] n 1: a member of a small Gnostic sect that originated in Jordan and survives in Iraq and who believes that John the Baptist was the Messiah [syn: {Mandaean}, {Mandean}] 2: the form of Aramaic used by the Mandeans [syn: {Mandaean}, {Mandean}]