ˈpräbəblē, ÷-äblē, -li adverb
1. archaic : in a fairly convincing way
your hypothesis … by which you have so probably solved the problem of gravity — Thomas Hobbes
2.
a. : insofar as seems reasonably true, factual, or to be expected : so far as fairly convincing evidence or indications go
will probably succeed
is probably quite happy
b. : without much doubt : with practical certainty : very likely : in all probability
will probably be here soon