probability

noun

1. The likelihood that something will happen or be true.

   B1

   uncountable

   • "There is a high probability of rain tomorrow."B1
   • "The probability that the plan will succeed is quite low."B2

2. In mathematics, a number from 0 to 1 that shows how likely an event is to happen.

   B2

   uncountable

   • "The probability of getting heads when you toss a fair coin is one-half."B2
   • "Scientists calculated the probability of the particle being detected in a particular region."C1

3. A branch of mathematics concerned with the analysis of random phenomena.

   C1

   uncountable

   • "He studied probability to understand statistical models better."B2