Wiktionary
adv. Very probably; almost certainly.
WordNet
adv. with considerable certainty; without much doubt; "He is probably out of the country"; "in all likelihood we are headed for war" [syn: probably, likely, in all likelihood, belike]
Usage examples of "in all probability".
If the human brain did not screen out millions of unneeded and unwanted impressions, sensory and neurological, as well as the paranormally received, we should in all probability go mad.
Government troops would undoubtedly fall back upon the town, when they would in all probability commence to sack and burn Opposition property.
London merchant the week previous, and reflecting that by the time the Society could discover his treachery, he would in all probability be on the high seas, far beyond the reach of vengeance or defeat.
I had long since chosen the spot for my death, and thither I proceeded, sticking my tombstone in the ground beside the place where in all probability my corpse would fall.