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• zeta
  zeta

  noun

  the sixth letter of the Greek alphabet (Z, ζ).
• ZETA
  ZETA

  noun

  a torus-shaped apparatus used for research in the 1950s and early 1960s on controlled thermonuclear reactions and plasma physics
• Zeta
  Zeta

  noun

  (foll by the genitive case of a specified constellation) the sixth brightest star in a constellation

zeta

American  

[zay-tuh, zee-] / ˈzeɪ tə, ˈzi- /

noun

1. the sixth letter of the Greek alphabet (Z, ζ).

2. the consonant sound represented by this letter.

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ZETA ¹ British  

/ ˈziːtə /

noun

1. a torus-shaped apparatus used for research in the 1950s and early 1960s on controlled thermonuclear reactions and plasma physics

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Zeta ² British  

/ ˈziːtə /

noun

1. (foll by the genitive case of a specified constellation) the sixth brightest star in a constellation

   Zeta Tauri

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zeta ³ British  

/ ˈziːtə /

noun

1. the sixth letter in the Greek alphabet (Ζ, ζ), a consonant, transliterated as z

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Usage

What else does zeta mean? Zeta is a letter of the Greek alphabet. As a letter, zeta is popularly encountered in the names of fraternities and sororities. Zeta is also popularly associated with a famous alien abduction story. In men’s rights lingo, zeta refers to a man who refuses to have their masculinity defined by or in terms of women. What are some other words related to zeta?alphaomegamanosphereincel

Etymology

Origin of zeta

First recorded in 1820–30, zeta is from the Greek word zêta

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Example Sentences

See Examples For:

zeta ZETA Zeta

For decades, mathematicians have tried to prove the Riemann hypothesis, which says that 100% of the nontrivial zeros of the Riemann zeta function fall on a single vertical line.

From The Wall Street Journal ● Aug. 15, 2026

Among these is the famous zeta ring, a very faint and dusty celestial object first discovered by the Voyager 2 satellite in 1986.

From Salon ● Dec. 19, 2023

“Spring training being closed in March would be worse for us than another covid outbreak, like if they announced the zeta variant was coming. It would be that bad.”

From Washington Post ● Feb. 23, 2022

However, Riemann’s formula only holds if one assumes that the real parts of these zeta function zeroes are all equal to one-half.

From Science Magazine ● Sep. 24, 2018

The letters phi, psi, sigma, zeta, which require a great deal of wind, are employed in the imitation of such notions as shivering, seething, shaking, and in general of what is windy.

From Cratylus by Benjamin Jowett

The firm plans to list itself on the New York Stock Exchange under the ticker symbol "ZETA".

From Reuters ● Apr. 26, 2021

Hours later, I was expelled from Zeta Beta Tau, my social fraternity, because its leaders were concerned my beliefs would reflect poorly on my brothers.

From The Wall Street Journal ● Sep. 29, 2026

Braze and Zeta also screen as potential takeover targets, along with Klaviyo, down 24% in six months and trading at 21 times earnings.

From Barron's ● Apr. 16, 2026

The research was funded by internal grants from Marian University and Sigma Zeta.

From Science Daily ● Apr. 2, 2026

The Zeta spokeswoman said the company is evaluating potential opportunities to work with Eightco, but the companies haven’t entered into a formal agreement.

From Barron's ● Jan. 30, 2026

“The atmospheric evaluation will require a...test subject. A chaperone of our own to explore the planet with Zeta unit.”

From "The Last Cuentista" by Donna Barba Higuera

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