from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Until this time: The weather, which had hitherto been sunny and mild, suddenly turned cold.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. Up to this or that time.
from the GNU version of the Collaborative International Dictionary of English
- adv. To this place; to a prescribed limit.
- adv. Up to this time; as yet; until now.
from The Century Dictionary and Cyclopedia
- To this place; thus far.
- To this time; until now.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adv. used in negative statement to describe a situation that has existed up to this point or up to the present time
From Middle English hiderto, corresponding to hither + to. (Wiktionary)