Final answer:
Judicial review is the power of the American judiciary to determine the constitutionality of actions taken by the other branches of government.
Step-by-step explanation:
Judicial review is the power of the American judiciary to look at actions taken by the other branches of government and determine whether they are constitutional.
It was established in the Supreme Court case Marbury v. Madison in 1803.
The power of judicial review enables the Supreme Court to declare acts of the other branches unconstitutional, making them null and void.
Learn more about Judicial review