so far

Từ điển WordNet v3.1 - WordNet Dictionary

adverb

1. used in negative statement to describe a situation that has existed up to this point or up to the present time (Freq. 7)
- So far he hasn't called
- the sun isn't up yet
• Syn:
thus far, up to now, hitherto, heretofore, as yet,
yet, til now, until now
2. to the degree or extent that
- insofar as it can be ascertained, the horse lung is comparable to that of man
- so far as it is reasonably practical he should practice restraint
• Syn:
insofar, in so far, to that extent, to that degree
3. used after a superlative
- this is the best so far
- the largest drug bust yet
• Syn:
yet