Pronunciation: (siz'um, skiz'-),[key] —n. 1. division or disunion, esp. into mutually opposed parties.
2. the parties so formed.
3. Eccles. a. a formal division within, or separation from, a church or religious body over some doctrinal difference.
b. the state of a sect or body formed by such division.
c. the offense of causing or seeking to cause such a division.