Adverb
Up to that time; before then; -- correlative with heretofore.
Source: Webster's dictionarythey had not done any work theretofore Source: Internet
King Władysław's quid pro quo for this boon was the nobles' guarantee that his throne would be inherited by one of his sons (who would be bound to honour the privileges theretofore granted to the nobility). Source: Internet
The analysis has been criticized by other Voynich Manuscript researchers, citation pointing out that—among other things—a skilled forger could construct plants that have a passing resemblance to theretofore undiscovered existing plants. Source: Internet
Any such amendment, alteration, suspension or termination of the Plan shall not impair the rights of any Plan Participant under any grant theretofore made without his or her consent. Source: Internet
Every ordinance introduced shall be in writing and read in full unless in accordance with the rules of procedure theretofore adopted before any vote thereon shall be taken and the yeas and nays shall be recorded. Source: Internet