Definitions of hereafter:

• noun:   the time yet to come
• noun:   life after death
• adverb:   following this in time or order or place; after this

  Example: "Hereafter you will no longer receive an allowance"

• adverb:   in a future life or state

  Example: "Hope to win salvation hereafter"

• adverb:   in a subsequent part of this document or statement or matter etc.