1. (noun)probability, chance 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 Synonyms: luck, fortune, prospect, chance, opportunity, probability, hazard Antonyms: improbableness, improbability
2. (noun)probability the quality of being probable; a probable event or the most probable event Synonyms: chance Antonyms: improbability, improbableness