Probability - Definition
probability
n 1: a measure of how likely it is that some event will occur; a
number expressing the ratio of favorable cases to the whole
number of cases possible; "the probability that an unbiased
coin will fall with the head up is 0.5" [syn:
probability, chance]
2: the quality of being probable; a probable event or the most
probable event; "for a while mutiny seemed a probability";
"going by past experience there was a high probability that
the visitors were lost" [ant: improbability,
improbableness]