WordNet sense 1 (within an indefinite time or at an unspecified future time):

eventually, in time, one of these days, sooner or later

WordNet sense 2 (used after a superlative):

so far

WordNet sense 3 (used in negative statement to describe a situation that has existed up to this point or up to the present time):

heretofore, hitherto, up to now, as yet, thus far, til now, until now

WordNet sense 4 (despite anything to the contrary (usually following a concession)):

however, nevertheless, nonetheless, notwithstanding, still, withal, all the same, even so

WordNet sense 5 (to a greater degree or extent; used with comparisons):

even