SINCE 1828
xi
noun
\ 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
Keep scrolling for more
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).
Test Your Vocabulary
Time Traveler Quiz: Which Word Came First?
-
- Which came first?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
Time Traveler Quiz: Which Word Came First?
Which word entered the English language first?
Take the quiz -
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quiz -
Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz -
Word Winder's CrossWinder
Play the game
Share xi
Resources for xi