Final answer:
Implied power means power that is not explicitly stated in the U.S. Constitution but is understood to be granted.
Judicial review is an example of such power, established in the landmark case Marbury v. Madison, which allows the courts to invalidate laws that are unconstitutional.
Step-by-step explanation:
Implied powers are powers not explicitly spelled out in the Constitution but are understood to be granted in order to carry out the enumerated powers.
Judicial review is one such implied power that allows the courts to determine if the actions of Congress and the Executive Branch are in accordance with the Constitution. If the courts find an action to be unconstitutional, that action becomes null and void. This power was established by the Supreme Court case Marbury v. Madison in 1803.
Judicial review serves as a key component of the checks and balances within the U.S. government, enabling the judicial branch to review and possibly invalidate actions and laws that go against constitutional principles.
Despite its influential role, judicial review is used judiciously, having been applied to strike down a relatively small number of state and national laws in the course of U.S. history, thus reinforcing a balanced governance.