'Edom' or 'Idumea,' as in Isaiah 34:5, signifies people who are in evil and falsities derived there.

(Notae: The Inner Meaning of the Prophets and Psalms 34)

34. Internal Meaning of Isaiah, Chapter 34

1-8 A last judgment upon all who are in evil and in falsities therefrom, is described. (15)

9-15 Having been cast down into hell they will abide in horrid falsities and evils to eternity. (15)

16 This has been foretold. (15)

17 It will be otherwise with those who are not such. (11)