[prob.a.bil.i.ty] n, pl -ties (15c) 1: the quality or state of being probable
2: something (as an event or circumstance) that is probable 3 a (1): the ratio of the number of outcomes in an exhaustive set of equally likely outcomes that produce a given event to the total number of possible outcomes (2): the chance that a given event will occur b: a branch of mathematics concerned with the study of probabilities
4: a logical relation between statements such that evidence confirming one confirms the other to some degree