(A) ** used in negative statement to describe a situation that has existed up to this point or up to the present time
(B) experimentation to determine how well something works
(C) in or at this place; where the speaker or writer is
(D) a politically organized body of people under government
EXPLANATIONS BELOW
Concept note-1: -Thus far means up until the present point in a situation or story. [formal]
Concept note-2: -His success thus far is heartening. Thus far, my project had failed on only two fronts. The evidence, thus far, points to slowdown rather than meltdown. Thus far, you’ve managed to coexist.
Concept note-3: -So far means ‘up until here’ or ‘up until now’: I have only met half of the staff so far. I have only met half of the staff up until now. How do you like San Francisco?-So far so good!
Concept note-4: -adverb. used in negative statement to describe a situation that has existed up to this point or up to the present time. synonyms: as yet, heretofore, so far, thus far, til now, until now, up to now, yet.