Morrish Bible Dictionary
In Revelation 9:11 this name is shown to be the same as Apollyon, 'the destroyer,' who is described as 'the angel of the bottomless pit.' It is perhaps not so much one of the names of Satan, as his character personified. It occurs six times in the Old Testament, in three of which it is associated with hell (sheol): Job 26:6; Proverbs 15:11; Proverbs 27:20; once with death: 'Destruction and Death say,' etc., Job 28:22; and once with the grave. Psalm 88:11 . In all these passages, and in Job 31:12 , it is translated 'destruction'.
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Morrish, George. Entry for 'Abaddon'. Morrish Bible Dictionary. https://www.studylight.org/dictionaries/eng/mbd/a/abaddon.html. 1897.