The quality or condition of being probable; likelihood.
A probable situation, condition, or event: Her election is a clear probability.
The likelihood that a given event will occur: little probability of rain tonight.
Statistics A number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences.
idioms
in all probability
Most probably; very likely.
The American Heritage® Dictionary of the English Language, Fourth Edition