Koss'moran

From Memory Alpha, the free Star Trek reference.

Koss'moran is a Bajoran legend that tells of false Prophets, the Pah-wraiths, who were cast out of the Bajoran celestial temple. The Bajoran word Koss'moran comes from the verb kosst that means "to be," and amoran, which means "banished." (DS9: "The Assignment")

[edit] Background Information

According to the Star Trek: Deep Space Nine Companion, Koss'moran is actually the same thing as Kosst Amojan - they both mean "to be banished". The phrase Kosst Amojan would appear in the episode "The Reckoning", but it would not be revealed as meaning anything specific. Although most fans seem to assume that Koss'moran and Kosst Amojan are actually two different concepts, according to the Companion, they represent the exact same idea. René Echevarria simply altered the name because he didn't like the sound of Koss'moran.