(formal) Up to which point; until which time.
(formal) Prior to now, until now, up to the present time; from the beginning to this point.
‘We now make available these works which were heretofore unpublished.’;
Up to this time; hitherto; before; in time past.
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’;