Piece of furniture, first in room until now (2,3)
I believe the answer is:
so far
'until now' is the definition.
(both can mean up to the current point)
'piece of furniture first in room' is the wordplay.
'piece of furniture' becomes 'sofa' (sofa is a type of furniture).
'first in room' becomes 'r' (1st letter of 'room').
'sofa'+'r'='SO FAR'
(Other definitions for so far that I've seen before include "to a certain degree" , "till now" , "To this point" , "Up until the present moment" .)