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say it: prah-buh-BIL-uh-tee
probability is a noun meaning "a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible". It carries 2 recorded senses.
a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible
“the probability that an unbiased coin will fall with the head up is 0.5”
“if that phone call is for me, chances are it's my wife”
the quality of being probable; a probable event or the most probable event
“for a while mutiny seemed a probability”
“going by past experience there was a high probability that the visitors were lost”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for probability come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.