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Definition of zeta
zeta
/ˈzeɪ.tə/
ze · ta
Plural:zetas
zeta Lexical Profile
CEFR
C1
Grade
10
Tier
2
Usage
Rare
Syllables
2
zeta Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
The sixth letter of the Greek alphabet (Ζ, ζ), transliterated as 'z'.
Example
"In mathematics, the lowercase Greek letter zeta is famously used to represent the Riemann zeta function."
2
The sixth in a series of items, particularly the sixth brightest star in a constellation or a mathematical variable.
Example
"The astronomer pointed the telescope toward Zeta Orionis, one of the three bright stars forming Orion's Belt."
• Rhymes for zeta
Word Origin & Etymology
Borrowed via Latin from Ancient Greek zēta, which was adapted from the Phoenician letter zayin.
Cite this Entry
Wordmom. (2026). Definition of Zeta. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/zeta