'Theretofore' definitions:

Definition of 'theretofore'

From: WordNet
adverb
Up to that time; "they had not done any work theretofore"

Definition of 'Theretofore'

From: GCIDE
  • Theretofore \There`to*fore"\, adv. Up to that time; before then; -- correlative with heretofore. [1913 Webster]