The main function of the judiciary in a political system is to interpret and apply the law. This ensures justice and safeguards individual rights, maintaining a balance of power among the different branches of government. The judiciary interprets laws, adjudicates disputes, and reviews lower court decisions. It serves as a check on legislative and executive authority by reviewing the constitutionality of laws and actions. In a democratic system, the independence of the judiciary is vital to uphold rule of law and protect civil liberties, allowing for fair trials and the enforcement of legal rights.