twenty-two

Short definition from Wiktionary

Numeral

1. 1
   The number after twenty-one and before twenty-three. Represented in Arabic digits as 22.
2. 2
   The cardinal number occurring after twenty one and before twenty three, represented in Roman numerals as XXII and in Arabic numerals as 22. Ordinal: twenty-second.

Noun

1. 1
   A .22 calibre pistol or rifle.