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English definition of “beta”

beta

noun [C or U] uk   /ˈbiː.tə/ us    /ˈbeɪ.t̬ə/ (symbol B, β)
the second letter of the Greek alphabet
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beta

adjective [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 Learners Dictionary & Thesaurus © Cambridge University Press)
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