|Origin:||posse comitatus 'power of the county'|
a group of the same kind of people
I was surrounded by a posse of photographers.
a group of men gathered together by a sheriff (=local law officer) in the US in past times to help catch a criminal
3 American English informal
someone's group of friends - used especially by young people
a group of friends from a particular place who share an interest in rap, hip-hop, or house music [= massive British English]