Meaning of UP TO NOW

WordNet Dictionary
	Definition:		[adv]  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" [adv]  prior to the present time; "no suspect has been found to date"
	Synonyms:		as yet, heretofore, hitherto, so far, thus far, til now, to date, until now, yet