xi | sense examples, Usage and Definition from wordnet dictionary online

Adjective xi has 1 sense

eleven, 11, xi - being one more than ten
Antonym: ordinal (indirect, via cardinal)

,Noun xi has 2 senses

eleven, 11, XI - the cardinal number that is the sum of ten and one
--₁ is a kind of large integer
xi - the 14th letter of the Greek alphabet
--₂ is a kind of letter, letter of the alphabet, alphabetic character
--₂ is a member of Greek alphabet

,