Judeo-Christian noun 2adjective 1forms 1 noun2 •(Judaism) Somebody who follows both Judaism and Christianity.Even the great devotion of the Judeo-Christians to Jesus did not separate them from Judaism. — 2012 •(Judaism) Somebody who is either Judaist or Christian. adjective1 •Of or pertaining to Judaism and Christianity.She and Fabrice and even Mosca are incapable of acting meanly, a thing that carries no weight in the Judaeo-Christian scheme of morals. — 1939 formsJudeo-Christians