noun be·ta \ˈbā-tə, chiefly British ˈbē-\

: the second letter of the Greek alphabet

: a version of a product (such as a computer program) that is almost finished and that is used for testing

Full Definition of BETA

:  the 2d letter of the Greek alphabet — see alphabet table
:  a measure of the risk potential of a stock or an investment portfolio expressed as a ratio of the stock's or portfolio's volatility to the volatility of the market as a whole
:  a nearly complete prototype of a product (as software) <released in beta> <the beta version>

Examples of BETA

  1. a program that is currently in beta

Origin of BETA

Middle English betha, from Latin beta, from Greek bēta, of Semitic origin; akin to Hebrew bēth beth
First Known Use: 14th century

Other Alphabet Terms

cuneiform, linear, minuscule, pictograph, rune, symbology, wedge

Rhymes with BETA



Definition of BETA

:  second in position in the structure of an organic molecule from a particular group or atom <beta substitution> —often used in combination —symbol β

First Known Use of BETA


Other Chemical Engineering Terms

alkali, cation, decant, hygroscopic, isotope, oxidize, slurry, solute, viscous
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears