We now make available these works which were heretofore unpublished.
Wiktionary
02
For quotations using this term, see Citations:heretofore.
Wiktionary
03
The Permanent Way: Britain's Railroads in the Making. By Horace Greenleaf and G. Tyers. […]There is no doubt that the permanent way has failed heretofore to attract popular interest to an extent compa
Wiktionary
04
They produced a state of poverty heretofore unheard of in England.
Tatoeba · #9116809
05
The book narrates the heretofore untold story of Tom Jackson, a nurse from Boston.
Tatoeba · #12116844
06
Tom has reached heretofore unseen levels of annoying.
Tatoeba · #12116845
Usage Notes
i Register
In some senses, heretofore is marked as formal. Watch for register when choosing this word.