American English

Definition of posse noun from the Oxford Advanced American Dictionary

     

    posse

     noun
    noun
    NAmE//ˈpɑsi//
     
     
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  1. 1 (in the past) a group of people who were brought together by a sheriff (= an officer of the law) in order to help him catch a criminal
  2. 2(informal) a group of people who are similar in some way, or who spend time together a little posse of helpers
  3. 3(informal) a group of young men involved in crime connected with drugs
See the Oxford Advanced Learner's Dictionary entry: posse