1910 New Catholic Dictionary
1) Hebrew word meaning ruin, place of destruction, realm of the dead (Job 31)
2) A prince of Hell, evil angel of death and disaster (Apocalypse 9); same as Apollyon, Destroyer.
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Entry for 'Abaddon'. 1910 New Catholic Dictionary. https://www.studylight.org/dictionaries/eng/ncd/a/abaddon.html. 1910.