xi
1. [ noun ] (mathematics) the cardinal number that is the sum of ten and one
Synonyms: 11 eleven
Related terms: large_integer
2. [ adjective ] being one more than ten
Synonyms: eleven 11
Related terms: cardinal
3. [ noun ] the 14th letter of the Greek alphabet
Related terms: letter Greek_alphabet
Similar spelling:   XII
  Xie
  XIII
  Xiao
  X