- Probability is defined as the likelihood of something occurring or the chance of something happening.
- When there is a 50 percent chance of something, this is an example of a time when the event has a probability of 50 percent.
- When there are gray clouds in the sky, this is an example of a time when there is a high probability of rain.

## probability

noun

*pl.*probabilities

- the quality or state of being probable; likelihood
- something probable
- Math. the ratio of the number of times something will probably occur to the total number of possible occurrences

Origin of probability

Middle French*probabilité*; from Classical Latin

*probabilitas*

**probability Idioms**

in all probability

very likely

## probability

noun

*pl.*

**prob·a·bil·i·ties**

- The quality or condition of being probable; likelihood.
- A probable situation, condition, or event:
*Her election is a clear probability.* - a. The likelihood that a given event will occur:
*little probability of rain tonight.*b.*Statistics*A number, ranging from zero to one, expressing either the projected likelihood that a specific event will occur or the observed ratio of the number of actual occurrences to the number of possible occurrences.

## probability

Noun

(*plural* probabilities)