The difference between a democracy and a republic lies primarily in their definitions and underlying principles. A democracy typically emphasizes majority rule and citizen participation in decision-making, allowing citizens to directly influence laws and policies. In contrast, a republic is a form of government that emphasizes rule by law and representatives elected by the people, prioritizing individual rights and justice. While republics can be democratic, not all democracies operate as republics. The U.S. Constitution enshrines principles of a republic, ensuring that elected representatives make decisions on behalf of the populace, thereby safeguarding against the potential tyranny of the majority.