Meaning of “beta” in the English Dictionary

"beta" in British English

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betanoun [ C or U ]

uk /ˈbiː.tə/ us /ˈbeɪ.t̬ə/ symbol B, β

betaadjective [ before noun ]

uk /ˈbiː.tə/ us /ˈbeɪ.t̬ə/

Beta software is at the second stage of development:

a beta disk
You can download the beta version from the website.

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

"beta" in Business English

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betaadjective

uk /ˈbiːtə/ us /ˈbeɪtə/

IT used to describe a product or system that is at the second stage of development and that is being tested by a few customers before it is offered for sale:

betanoun [ C, usually singular ]

uk /ˈbiːtə/ us

IT →  beta version :

The beta is still being tested.

FINANCE, STOCK MARKET →  beta coefficient :

Shares with a beta greater than one are more volatile than the market.
During the recent bull market, high beta shares substantially outperformed low beta shares.

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