Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “probability”

probability

noun [C/U]    /ˌprɑb·əˈbɪl·ɪ·t̬i/ mathematics
a number that represents how likely it is that a particular thing will happen Probability is the study of the mathematics of calculating the likelihood that particular events will happen.
(Definition of probability noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of probability

More American English definitions for “probability”

Definitions of “probability” in other dictionaries

Word of the Day

touch

an ability to do things in the stated, especially positive, way

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More