/ ˈprɒbəbli; NAmE ˈprɑːb-/ adverb
used to say that sth is likely to happen or to be true :
You're probably right.
It'll probably be OK.
It was the best known and probably the most popular of her songs.
'Is he going to be there?' 'Probably.'
'Do we need the car?' 'Probably not.'
As you probably know, I'm going to be changing jobs soon.
The two cases are most probably connected.