n.1 a the division of a group into opposing sections or parties. b any of the sections so formed.
2 a the separation of a Church into two Churches or the secession of a group owing to doctrinal, disciplinary, etc., differences. b the offence of causing or promoting such a separation.
Etymology: ME f. OF s(c)isme f. eccl.L schisma f. Gk skhisma -atos cleft f. skhizo to split