so far

Adverb

• used after a superlative
  • this is the best so far
    
  • the largest drug bust yet
    

• 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
    

• 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
    

Related words

• Synonyms: 
  yet , insofar , in so far , to that extent , to that degree , thus far , up to now , hitherto , heretofore , as yet , til now , until now