#gangster__mobster  a criminal who is a member of gang
  supertype:  criminal__felon__crook__outlaw__malefactor  someone who has committed (or been legally convicted of) a crime
  subtype:  apache  yardie
  instance:  Alphonse_Capone
  member of:  mob__gang__pack__ring  an association of criminals; "police tried to break up the gang"; "a pack of thieves"
     member of:  organized_crime__organizedcrime__gangland__gangdom  underworld organizations
        member of:  underworld  the criminal class

No statement uses or specializes gangster; click here to add one.