the quality or state of being probable; the extent to which something is likely to happen or be the case:the rain will make the probability of a postponement even greater
[count noun] a probable or the most probable event:for a time revolution was a strong probability
Mathematics the extent to which an event is likely to occur, measured by the ratio of the favourable cases to the whole number of cases possible:the area under the curve represents probability [count noun]:a probability of 0.5
in all probability
used to convey that something is very likely:he would in all probability make himself known