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. |
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Example | "the *probability* that an unbiased coin will fall with the head up is 0.5" |
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Synonym | chance |
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Narrower | conditional probability, contingent probability | The probability that an event will occur given that one or more other events have occurred |
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cross section | (physics) the probability that a particular interaction (as capture or ionization) will take place between particles |

exceedance | (geology) the probability that an earthquake will generate a level of ground motion that exceeds a specified reference level during a given exposure time |

fair chance, sporting chance | A reasonable probability of success |

fat chance, slim chance | Little or no chance of success |

joint probability | The probability of two events occurring together |

risk, risk of exposure | The probability of being exposed to an infectious agent |

risk, risk of infection | The probability of becoming infected given that exposure to an infectious agent has occurred |

Broader | measure, quantity, amount | How much there is or how many there are of something that you can quantify |
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Spanish | probabilidad |
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Catalan | probabilitat |
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Adjectives | probabilistic | of or relating to or based on probability |
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probable | likely but not certain to be or become true or real |