A group of people who are brought together by a sheriff to help with law enforcement is an example of a posse.
If you get into an argument with someone and start a fist-fight and you have five of your friends to back you up in the fight, these five friends are an example of your posse.
Other Word Forms
Origin of posse
- Short for posse comitatus
From American Heritage Dictionary of the English Language, 5th Edition
- From Medieval Latin posse comitatus.