'Hereof' definitions:

Definition of 'hereof'

(from WordNet)
adverb
Of or concerning this; "the twigs hereof are physic"

Definition of 'Hereof'

From: GCIDE
  • Hereof \Here*of"\, adv. Of this; concerning this; from this; hence. [1913 Webster]
  • Hereof comes it that Prince Harry is valiant. --Shak. [1913 Webster]