1 [uncountable and countable]
how likely something is, sometimes calculated in a mathematical way [= likelihood, chance]
the probability of (doing) something
The probability of winning the lottery is really very low.
There's a high probability that the children will follow a different career.
There is a 95% probability that she will not have the disease.
You must decide whether, on the balance of probabilities, he committed the crime.
what is likely or something that is likely:
The probability is that smaller businesses will not have to pay the tax.
A peace agreement now seems a probability rather than a possibility.
projects that have a high probability of making profits
Mistakes could and, in all probability, would occur.