(mathematics) The mathematical study of probability (the likelihood of occurrence of random events in order to predict the behavior of defined systems).

(statistics) A distribution of all possible values of a random variable together with an indication of their probabilities.

(mathematics) A measurable space having a unit measure

(statistics) The probability of an event given the knowledge of occurrence of other events that bear on it; P( A | B ) as contrasted to P( A ), where A is the sought event and B is the sign or symptom event.

(statistics) The probability of an event obtained without the knowledge of occurrence of other events that bear on it.

(probability theory) probability density function

plural of probability space

plural of probability measure

(law) Alternative form of balance of probabilities

(quantum mechanics) A complex number which is the coefficient of a component of a quantum state and whose product with its own complex conjugate gives the probability that the state will collapse to that component (when measured). (Note: the quantum state being thought of as a linear combination of its components.)