noun (n)

• a political system in which the supreme power lies in a body of citizens who can elect people to represent them(noun.group)

  Synonym:
  commonwealth, democracy
  

  source: wordnet30
• a form of government whose head of state is not a monarch(noun.group)

  Example:
  The head of state in a republic is usually a president.
  

  source: wordnet30
• Common weal.(noun)

  source: webster1913