Abaddon. A Hebrew word אֲבַדּוֹן, signifying destruction. By the Rabbis it is interpreted as the place of destruction, and is the second of the seven names given by them to the region of the dead. In the Apocalypse (ix. 11) it is rendered by the Greek word Ἀπολλύων, Apollyon, and means the destroyer. In this sense it is used as a significant word in the high degrees.