Zen [zen] noun Chinese Ch’an. Buddhism. a Mahayana movement, introduced intoChina in the 6th century a.d. and into Japan in the 12th century, thatemphasizes enlightenment for the student by the most direct possiblemeans, accepting formal studies and observances only when theyform part of such means. But by the river, when do we really have the Zen attitude? It is a...