1.
[syn: so far, thus far, up to now, hitherto, heretofore, as yet, yet, til now, until now]
The Collaborative International Dictionary of English v.0.48:
Heretofore \Here`to*fore"\, adv.
Up to this time; hitherto; before; in time past. --Shak.
[1913 Webster]
WordNet (r) 3.0 (2006):
heretofore
adv 1: used in negative statement to describe a situation that
has existed up to this point or up to the present time;
"So far he hasn't called"; "the sun isn't up yet" [syn:
so far, thus far, up to now, hitherto,
heretofore, as yet, yet, til now, until now]