The term "checks and balances" refers to a system within governmental structures designed to ensure that no single branch becomes too powerful. This system allows each branch—typically the executive, legislative, and judicial—to monitor and limit the actions of the others. For example, the legislature can pass laws, the executive can veto those laws, and the judiciary can rule on their constitutionality. This interplay promotes a balance of power and protects against tyranny, fostering accountability and adherence to democratic principles.