Cluniac adjective 1noun 1forms 1 adjective1 •Relating to a reformed Benedictine monastic order founded at Cluny in eastern France. noun1 •(historical) A monk of the reformed branch of the Benedictine order, founded in 910 at Cluny (or Clugny) in France.[…] maximism of the Cluniacs on the one hand and the minimism of puritanic Cistercianism on the other. — 1918 formsCluniacs