federation federation /ˌfɛdɝˈeɪʃən/

noun

1. The act of constituting a political unity out of a number of separate states, colonies or provinces so that each member retains the management of its internal affairs  ( federation )
   the act of constituting a political unity out of a number of separate states, colonies or provinces so that each member retains the management of its internal affairs
    The federation was established to bring together multiple provinces under one central governance.
   The federation was established to bring together multiple provinces under one central governance.
   
   
2. A union of political organizations  ( confederation , federation , confederacy )
   a union of political organizations
   
3. An organization formed by merging several groups or parties  ( federation )
   an organization formed by merging several groups or parties