Apol'lyon. Apollyon or, as it is literally in the margin of the Authorized Version of Revelation 9:11, "a destroyer", is the rendering of the Hebrew word, Abaddon, "the angel of the bottomless pit". From the occurrence of the word in Psalms 88:11, the rabbins have made Abaddon, the nethermost of the two regions into which they divide the lower world; but that in Revelation 9:11, Abaddon is the angel and not the abyss, is perfectly evident in the Greek.