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• eta
  eta

  noun

  the seventh letter of the Greek alphabet (H, η).
• E.T.A.
  E.T.A.

  abbreviation

  estimated time of arrival.
• ETA
  ETA

  abbreviation

  estimated time of arrival

eta

¹ American  

[ey-tuh, ee-tuh] / ˈeɪ tə, ˈi tə /

noun

1. the seventh letter of the Greek alphabet (H, η).

2. the vowel sound represented by this letter.

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E.T.A. ² American  

Or ETA

abbreviation

1. estimated time of arrival.

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ETA ¹ British  

abbreviation

1. estimated time of arrival

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ETA ² British  

/ ˈɛtə /

acronym

1. Euzkadi ta Askatsuna: an organization of militant Basque nationalists attempting to gain independence for the Basques, esp those ruled by Spain, until a ceasefire in 1998, by means of guerrilla warfare

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eta ³ British  

/ ˈiːtə /

noun

1. the seventh letter in the Greek alphabet (Η, η), a long vowel sound, transliterated as e or ē

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eta ⁴ British  

/ ˈeɪtə /

noun

1. (in Japan, formerly) a member of a class of outcasts who did menial and dirty tasks

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Etymology

Origin of eta

< Greek êta; compare Hebrew ḥeth heth

Example Sentences

But other variants – eta, theta, iota – were quickly steamrolled and are now irrelevant.

From Seattle Times • Dec. 14, 2021

The importance of those men dressed in white is clearly shown by the symbol that looks like an H, the Greek letter eta.

From National Geographic

The Brookhaven experiment involved a fast-decaying subatomic particle known as an eta meson, which breaks down into three lighter particles known as pions�one with no electrical charge.

From Time Magazine Archive

Status Symbol The H on the men’s clothing is the Greek letter eta.

From National Geographic

It says to the eta, "come into humanity and society, receive the protection of law, and the welcome of your fellows; let memory forget the past and charity make a new future."

From The Religions of Japan From the Dawn of History to the Era of Méiji by Griffis, William Elliot