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\ ˈzī 
, ˈksī \
, ˈksī \ plural xis
Definition of xi
(Entry 1 of 2)
: the 14th letter of the Greek alphabet — see Alphabet Table
Xi
geographical name\ ˈshē \
\variants:
or Hsi or Si
Definition of Xi (Entry 2 of 2)
river 300 miles (483 kilometers) long in Guangxi Zhuangzu and Guangdong, southeastern China, flowing east into the South China Sea
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The first known use of xi was in the 15th century
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