yet in WordNet English dictionary

1. despite anything to the contrary (usually following a concession)
   "although I'm a little afraid, however I'd like to try it"; "while we disliked each other, nevertheless we agreed"; "he was a stern yet fair master"; "granted that it is dangerous, all the same I still want to go"
   however  nevertheless  withal  still  yet  all the same  even so  nonetheless  notwithstanding  however  nevertheless  withal  still  yet  all the same  even so  nonetheless  notwithstanding 
   
2. 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"
   so far  thus far  up to now  hitherto  heretofore  as yet  yet  til now  until now  so far  thus far  up to now  hitherto  heretofore  as yet  yet  til now  until now 
   
3. to a greater degree or extent; used with comparisons
   "looked sick and felt even worse"; "an even (or still) more interesting problem"; "still another problem must be solved"; "a yet sadder tale"
   even  yet  still  even  yet  still 
   
4. within an indefinite time or at an unspecified future time
   "he longed for the flowers that were yet to show themselves"; "sooner or later you will have to face the facts"; "in time they came to accept the harsh reality"
   yet  in time  yet  in time 
   
5. used after a superlative
   "this is the best so far"; "the largest drug bust yet"
   so far  yet  so far  yet 
   
6. up to the present time
   "I have yet to see the results"; "details are yet to be worked out"
   yet  yet