Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

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
Compare
Letters of alphabetsLettering and alphabets

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.Computer programming and softwareStages and phases
(Definition of beta from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of beta?
Add Cambridge dictionaries to your browser to your website

Definitions of “beta” in other dictionaries

Word of the Day

pint

a measure for liquid equal to about half a litre

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More