Why constitution is called as fundamental law of nation?

The constitution is often referred to as the fundamental law of a nation because it establishes the foundational principles and framework of governance. It outlines the structure of government, the distribution of powers, and the rights of citizens, serving as the supreme legal authority. This foundational role ensures that all laws and policies align with constitutional provisions, safeguarding the rule of law and protecting individual liberties. As such, it is the ultimate reference point for legal interpretation and the functioning of the state.