- the 14th letter in the Greek alphabet (Ξ, ξ), a composite consonant, transliterated as x
WordReference Random House Unabridged Dictionary of American English © 2026
xi
(zī, sī; Gk. ksē),USA pronunciation n., pl. xis.
- the 14th letter of the Greek alphabet (Χ, χ).
- the group of consonant sounds represented by this letter.
Collins Concise English Dictionary © HarperCollins Publishers::
xi /zaɪ; saɪ; ksaɪ; ksiː/ n ( pl xis)
Collins Concise English Dictionary © HarperCollins Publishers::
Xi, Hsi, Si /ʃiː/ n
- a river in S China, rising in Yunnan province and flowing east to the Zhu Jiang delta on the South China Sea: the main river system of S China. Length: about 1900 km (1200 miles)
'xi' also found in these entries (note: many are not synonyms or translations):
Boabdil
- Changan
- Charles XI
- Chu Xi
- Constantine XI
- eleven
- Guizhou
- Hsi
- Hsian
- Louis XI
- Meštrović
- Pius XI
- Shaanxi
- Si
- Sian
- Si Kiang
- Siking
- Xi'an
- Xiang
- Zi Xi
- Anne of France
- Benedict XI
- cascade particle
- Chapter 11
- Charles VIII
- Clement XI
- Constantine XI Palaeologus
- creature
- Gregory XI
- Guangxi Zhuang
- Hsi Chiang
- Innocent XI
- John XI
- K'ang Hsi
- Leo XI
- xian
- Xi Jiang
- xi particle
- Zhu Xi