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Definition of probability
probabilities
1 : the quality or state of being probable
2 : something (such as an event or circumstance) that is probable
3a (1) : the ratio of the number of outcomes in an exhaustive set of equally likely outcomes that produce a given event to the total number of possible outcomes (2) : the chance that a given event will occurb : a branch of mathematics concerned with the study of probabilities
4 : a logical relation between statements such that evidence confirming one confirms the other to some degree
Examples of probability in a Sentence
There is a low probability that you will be chosen.
There is some probability of rain tomorrow.
With the dark clouds moving in, rain seems more like a probability than a possibility.
The probability of a coin coming up heads is one out of every two tries.
Recent Examples of probability from the Web

South Korea's defense minister, Han Minkoo, said there is high probability Pyongyang will stage another nuclear test.

Five of the 10 with the highest probabilities—including Nogales, Sonora, and Juarez, Chihuahua—are in states along the U.S. border.

The probability of anything happening to both her and her husband is very slim.

The probability of anything happening to both her and her husband is very slim.

A welldistilled qubit The researchers in the Netherlands showed that this worked by measuring the state fidelity, which is basically a measure of the probability of finding the qubit in the state that it was set to.

In 2006, the probabilities at the top held true to form and the Hawks followed the Blues picking Erik Johnson and the Penguins taking Jordan Staal with the selection of Jonathan Toews.

But rather than simply predict whether each bill would or would not pass, Nay wanted to assign each a specific probability.

The probabilities are up to 90 percent that something is going to get going in the Gulf of Mexico soon.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'probability'. Views expressed in the examples do not represent the opinion of MerriamWebster or its editors. Send us feedback.
First Known Use of probability
15th century
Other Mathematics and Statistics Terms
PROBABILITY Defined for English Language Learners
probability
playDefinition of probability for English Language Learners

: the chance that something will happen

: something that has a chance of happening

: a measure of how often a particular event will happen if something (such as tossing a coin) is done repeatedly
PROBABILITY Defined for Kids
probability
playDefinition of probability for Students
probabilities
1 : the chance of happening The probability of rain is low.
2 : something likely Rain is a probability.
3 : a measure of how likely a given event is The probability of a coin landing face up is 1⁄2.
Learn More about probability

See words that rhyme with probability Thesaurus: All synonyms and antonyms for probability Spanish Central: Translation of probability Nglish: Translation of probability for Spanish speakers Britannica English: Translation of probability for Arabic speakers Britannica.com: Encyclopedia article about probability
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