四し土どMeanings1nounfour realmsBuddhismBuddhist doctrinal term referring to four types of lands or realms, particularly in Tendai and Yogacara thought. Not used in everyday conversation.天てん台だい宗しゅうでは四し土どの教おしえが説とかれる。In the Tendai school, the teaching of the four realms is expounded.