The main function of the judiciary in a political system is to interpret and apply the law, ensuring justice and maintaining the rule of law. It serves as a check on the powers of the executive and legislative branches, safeguarding against abuses of power. The judiciary resolves disputes, upholds constitutional rights, and evaluates the legality of laws and executive actions. In democracies, an independent judiciary is essential for protecting individual liberties and ensuring that all citizens, regardless of status, have access to justice.