" is a common abbreviation for "municipal
", and sometimes becomes a frequently-used name for a city-related service or organization:
A muni is a mountain unicycle.
A muni is a sage or monastic from a religion such as Buddhism, Jainism or Hinduism.
Paul Muni (1897-1967) was an American actor.
Masaryk University Brno is often abbreviated to "Muni".
Rio Muni was a Spanish colony that is now part of Equatorial Guinea.