Definition of probability Probability

/pɹɑˌbʌbɪˈlʌti/ - [prabubilutee] - prob•a•bil•i•ty

We found 12 definitions of probability from 6 different sources.

What does probability mean?

WordNet

Noun Plural: probabilities
probability - 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"
		chance
		quantity, amount, measure an adequate or large amount; "he had a quantity of ammunition"
		conditional probability, contingent probability the probability that an event will occur given that one or more other events have occurred
		cross section (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns
		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; "the concept of exceedance can be applied to any type of environmental risk modeling"
		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 of exposure, risk a venture undertaken without regard to possible loss or injury; "he saw the rewards but not the risks of crime"; "there was a danger he would do the wrong thing"
probability - 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"
		improbability, improbableness the quality of being improbable; "impossibility should never be confused with improbability"; "the improbability of such rare coincidences"
		quality an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare

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Wiktionary

probability (Noun)
The state of being probable; likelihood.
probability (Noun)
An event that is likely to occur.
probability (Noun)
The relative likelihood of an event happening.
probability (Noun)
A number, between 0 and 1, expressing the precise likelihood of an event happening.

Webster DictionaryWebster's Unabridged Dictionary 📘

probability (n.)
The quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood.
probability (n.)
That which is or appears probable; anything that has the appearance of reality or truth.
probability (n.)
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.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

probability
The chance of an event occurring.

Wikipedia

Probability is a part of mathematics. It is to do with chance, the study of things that might happen or might not happen.

For example, using probability, you can show that if you throw a coin up in the air and let it land, half of the time it will land with one side facing up, and half the time with the other side facing up. Many coins have a picture of the face of a famous person on one side, and something else on the other side. Often people call the side with the face "heads", and the other side "tails".

The probability (p) of an event is always between zero (impossible) and one (certain).

If we roll a die (plural: dice), then the chance that it will land on 1 is 1/6 (This is because there are 6 numbers on a die). Also, the chance it will land on 2 is 1/6. This is because it can land on 1, 2, 3, 4, 5, or 6.

The chance of any number between 1 and 6 landing is 1. Every time we roll the die, it will always land on a number between 1 and 6.