The
nats (; ) are spirits worshipped in
Burma (or Myanmar) in conjunction with
Buddhism. They are divided between the 37 Great Nats and all the rest (i.e., spirits of trees, water, etc.). Almost all of the 37 Great Nats were human beings who met violent deaths (, lit. "green death"). They may thus also be called
nat sein (; lit. green spirits). The word 'sein', while meaning 'green', is being used to mean 'raw' in this context. There are however two types of nats in Burmese Buddhist belief.