xi

noun
\ˈzī, ˈksī \
plural xis

Definition of xi 

(Entry 1 of 2)

: the 14th letter of the Greek alphabet — see Alphabet Table

Xi

geographical name
variants: or Hsi or Si \ˈshē \

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

First Known Use of xi

Noun

15th century, in the meaning defined above

History and Etymology for xi

Noun

Greek xei

Keep scrolling for more

Learn More about xi

Dictionary Entries near xi

xg

x-height

Xhosa

xi

Xi

Xi'an

Xiamen

Statistics for xi

Look-up Popularity

Time Traveler for xi

The first known use of xi was in the 15th century

See more words from the same century

More from Merriam-Webster on xi

Rhyming Dictionary: Words that rhyme with xi

Comments on xi

What made you want to look up xi? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a soft lustrous wool fabric with mohair

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!