Webster's English Dictionary

Enter the word to look up:

posse

pos.se \'pa:s-e-\ n [ML posse comitatus, lit., power or authority of the 
   county] 1: a body of persons summoned by a sheriff to assist in preserving 
   the publ ic peace usu. in an emergency 2: a group of people temporarily 
   organized to make a search (as for a lost  child)