Definition of xi in English:

xi

Syllabification: xi
Pronunciation: /zī, ksī
 
 
/

noun

  • 1The fourteenth letter of the Greek alphabet (Ξ, ξ), transliterated as ‘x.’.
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    • This page displays the Greek alphabet and gives information on pronunciation for both ... y as in yet, and before gamma, kappa, xi, or chi.
    • While having no Latin derivative, the Xi was adopted into the early Cyrillic alphabet, as the letter ksi.
  • 1.1 (Xi) [followed by Latin genitive] Astronomy The fourteenth star in a specified constellation: Xi Cygni
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    • The highlight for me that night was Xi Bootes. This colorful double lies about 8 degrees east of Arcturus.

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