What is it called to throw out a law if it is unconstitutional?

The process of throwing out a law because it is deemed unconstitutional is known as "judicial review." This power allows courts, particularly the Supreme Court in the United States, to evaluate the constitutionality of legislative and executive actions. When a law is ruled unconstitutional, it is considered null and void, meaning it cannot be enforced. This principle helps to uphold the rule of law and protect individual rights.