- the second letter in the Greek alphabet (Β, β), a consonant, transliterated as b
- the second highest grade or mark, as in an examination
WordReference Random House Learner's Dictionary of American English © 2020
- Linguisticsthe second letter of the Greek alphabet (B, &bgr;
- Linguisticsthe second letter of the Greek alphabet (β, B).
- Linguisticsthe consonant sound represented by this letter.
- (cap.) [Astron.]a star that is usually the second brightest of a constellation:The second brightest star in Taurus is Beta Tauri.
- one of the possible positions of an atom or group in a compound.
- one of two or more isomeric compounds.
- Chemistry, Physicsthe second of any series, as in chemistry or physics.
- Stock Exchange, BusinessAlso called beta coefficient, beta line. an arbitrary measure of the volatility of a given stock using an index of the volatility of the market as a whole:A beta of 1.1 indicates a stock that is 10 percent more volatile than the market.
- Radio and Television, Trademarks(cap.) [Trademark.]a brand of tape format for VCR tape, incompatible with other formats. Cf. VHS.
- British Terms, Education[Chiefly Brit.]a grade showing that a student is in the middle or second of three scholastic sections in a class. Cf. alpha (def. 7), gamma (def. 9).
- Semitic; compare Hebrew bēth beth
- Greek bêta