# Definition of “probability” - English Dictionary

## “probability” in English

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### probabilitynoun [ C or U ]

uk /ˌprɒb.əˈbɪl.ə.ti/ us /ˌprɑː.bəˈbɪl.ə.t̬i/

C1 the level of possibility of something happening or being true:

What is the probability of winning?
The probability of getting all the answers correct is about one in ten.
There's a high/strong probability (that) (= it is very likely that) she'll be here.
Until yesterday, the project was just a possibility, but now it has become a real probability (= it is likely to happen).
Synonym
in all probability

C2 used to mean that something is very likely:

She will, in all probability, have left before we arrive.

More examples

• What's the probability of that happening?
• There's a strong probability that we'll have moved by then.
• There's a distinct probability that Philip will be there.
• There's a high probability that she'll get the job.
• Against all probability we found ourselves in the same hotel.

Thesaurus: synonyms and related words

(Definition of “probability” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

## “probability” in American English

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### probabilitynoun [ C/U ]

us /ˌprɑb·əˈbɪl·ɪ·t̬i/

mathematics a number that represents how likely it is that a particular thing will happen

mathematics Probability is the study of the mathematics of calculating the likelihood that particular events will happen.

the likelihood of something happening or being true:

[ C ] There’s a higher probability of now having a state income tax (= the tax is more likely now).
In all probability he would never see her again (= very likely he would not see her again).

(Definition of “probability” from the Cambridge Academic Content Dictionary © Cambridge University Press)

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### probabilitynoun [ C or U ]

uk /ˌprɒbəˈbɪləti/ us plural probabilities

the level of possibility that something will happen or is true:

high/low/strong probability There is a strong probability that the country will fall into recession again.
probability of sth Spam filters calculate the probability of a message being spam.
assess/calculate/estimate the probabilities They also estimated the probabilities of dividend increases and decreases under certain circumstances.

(Definition of “probability” from the Cambridge Business English Dictionary © Cambridge University Press)

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