21
Topics referred to by the same term / From Wikipedia, the free encyclopedia
Twenty-one, XXI or 21 may refer to:
- 21 (number), the natural number following 20 and preceding 22
- The years 21 BC, AD 21, 1921, 2021
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Look up twenty-one in Wiktionary, the free dictionary.