ad. Prior to now, until now, up to the present time; from the origin to this point.
the GNU version of the Collaborative International Dictionary of English
ad. Up to this time; hitherto; before; in time past.
The Century Dictionary and Cyclopedia
Before this time; formerly; up to this time.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. used in negative statement to describe a situation that has existed up to this point or up to the present time
Word Usage
"Severin's 2.35:1 anamorphic transfer is exquisite, adding considerable lustre to a title heretofore known in this country only through dupey, unsubtitled, bootleg tapes."