Definition of separation of powers in English English dictionary
A theoretical model for governance, common in democratic states, which features the division of sovereign power into at least three (but sometimes up to six) organs of state in order to forestall tyranny, by preventing the acquisition of a monopoly of power by a monarch or oligarchy; also, such an arrangement
separation of authority, distribution of power, basic democratic principle in which every government department has independent authority and curbs the power of other departments
Division of the legislative, executive, and judicial functions of government among separate and independent bodies. Such a separation limits the possibility of arbitrary excesses by government, since the sanction of all three branches is required for the making, executing, and administering of laws. The concept received its first modern formulation in the work of Charles-Louis de Secondat, baron de La Brède et de Montesquieu, who declared it the best way to safeguard liberty; he influenced the framers of the Constitution of the United States, who in turn influenced the writers of 19th-and 20th-century constitutions. See also checks and balances