"Judicial review" refers to the power of courts to assess the constitutionality of laws and government actions. In the context of constitutional law, it enables judicial bodies to invalidate legislation or executive actions that contravene the principles enshrined in a nation's constitution. This process is pivotal for maintaining the rule of law and protecting fundamental rights, offering a system of checks and balances on governmental power. Through judicial review, the judiciary ensures that all branches of government operate within their designated limits.