What does Probability mean?

Definitions for Probabilityˌprɒb əˈbɪl ɪ ti

Here are all the possible meanings and translations of the word Probability.

Princeton's WordNet

  1. probability, chance(noun)

    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"

  2. probability(noun)

    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"


  1. probability(Noun)

    the state of being probable; likelihood

  2. probability(Noun)

    an event that is likely to occur

  3. probability(Noun)

    the relative likelihood of an event happening

  4. probability(Noun)

    a number, between 0 and 1, expressing the precise likelihood of an event happening

  5. Origin: From probabilitas, from probabilis; see probable.

Webster Dictionary

  1. Probability(noun)

    the quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood

  2. Probability(noun)

    that which is or appears probable; anything that has the appearance of reality or truth

  3. Probability(noun)

    likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. See 1st Chance, n., 5


  1. Probability

    Probability is a measure or estimation of how likely it is that something will happen or that a statement is true. Probabilities are given a value between 0 and 1. The higher the degree of probability, the more likely the event is to happen, or, in a longer series of samples, the greater the number of times such event is expected to happen. These concepts have been given an axiomatic mathematical derivation in probability theory, which is used widely in such areas of study as mathematics, statistics, finance, gambling, science, artificial intelligence/machine learning and philosophy to, for example, draw inferences about the expected frequency of events. Probability theory is also used to describe the underlying mechanics and regularities of complex systems.

U.S. National Library of Medicine

  1. Probability

    The study of chance processes or the relative frequency characterizing a chance process.

Suggested Resources

  1. probability

    The probability symbol -- In this Symbols.com article you will learn about the meaning of the probability symbol and its characteristic.

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'Probability' in Nouns Frequency: #1885


  1. Chaldean Numerology

    The numerical value of Probability in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of Probability in Pythagorean Numerology is: 3

Sample Sentences & Example Usage

  1. E.W. Howe:

    A reasonable probability is the only certainty.

  2. Marcus Xu:

    The probability of the Fed raising rates is getting higher.

  3. Lise Nordin:

    The probability that new nuclear power will be built is zero.

  4. William Osler:

    Medicine is a science of uncertainty and an art of probability.

  5. John Perry:

    Hope provides comfort, and hope does not always require probability.

Images & Illustrations of Probability

  1. ProbabilityProbabilityProbability

Translations for Probability

From our Multilingual Translation Dictionary

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"Probability." Definitions.net. STANDS4 LLC, 2018. Web. 19 Feb. 2018. <https://www.definitions.net/definition/Probability>.

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