xi

Short definition from Wiktionary

Noun

1. 1
   The 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek.
2. 2
   Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion.
3. 3
   Capital Greek letter Ξ (X)
4. 4
   Capital Greek letter Ξ (X): Alternative form of xi, Greek letter Ξ/ξ (X/x)
5. 5
   Alternative form of xi/Ξ, ellipsis of xi baryon.
6. 6
   A football (soccer) team of eleven players.
7. 7
   A cricket team of eleven players.

Proper noun

1. 1
   A river in China, the western tributary of the Pearl.
2. 2
   A surname from Chinese
3. 3
   A surname from Chinese: Xi Jinping, current General Secretary of the Chinese Communist Party (2012–present).
4. 4
   A county of Linfen, Shanxi, China.

Symbol

1. 1
   Ⅺ, the Roman numeral eleven (11).

Numeral

1. 1
   Roman numeral eleven (11).