Japanese; Ch'an (Chinese); a branch of Mahayana Buddhism which developed in China during the sixth and seventh centuries after Bodhidharma arrived; it later divided into the Soto and Rinzai schools; Zen stresses the importance of the enlightenment experience and the futility of rational thought, intellectual study and religious ritual in attaining this; a central element of Zen is zazen, a meditative practice which seeks to free the mind of all thought and conceptualization.