What is a fundamental or important law or edict known as?

The term "Constitution" refers to a fundamental or important law or edict that establishes the framework for governance and outlines the principles and laws that govern a nation or organization. Constitutions serve as the highest legal authority in a political system, laying down the structure of government, the distribution of powers, and the rights of citizens.

In contrast, other options represent different legal concepts. A statute refers to a formal law enacted by a legislative body, ordinances are local laws created by municipalities or local government bodies, and regulations are detailed rules made to implement the laws passed by the legislature. Each of these plays a significant role in the legal system but does not have the overarching importance or foundational role that a constitution holds.