What does bicameralism mean?
Bicameralism is the principle or institutional system of dividing legislative authority between two chambers. Each chamber may represent a different basis of political authority, such as popular representation, regional representation, or another constitutional division, and legislation normally must be approved by both. The United States Congress, with its House of Representatives and Senate, and the British Parliament, with the Commons and House of Lords, are prominent examples. The term is chiefly formal and is commonly encountered in constitutional law, political science, and comparative government. Bicameralism is often associated with checks and balances because agreement between two deliberative bodies can limit the immediate power of a single majority. Its advantages and drawbacks are debated: it may broaden representation and encourage deliberation, but it can also complicate legislation, give certain interests an additional institutional stage, and create opportunities for deadlock. The word therefore names a method of organizing a legislature rather than inherently endorsing or condemning that method.
nounThe principle or system of government in which legislative authority is divided between two chambers. It is most commonly used to describe national legislatures composed of two deliberative bodies.
- The division of legislative authority between two chambers, especially in a national legislature.
"The proposed constitutional reform would replace bicameralism with a single legislative chamber."
"Congress is an example of bicameralism, with legislative authority divided between the House of Representatives and the Senate."
"The political theorist argued that bicameralism can limit the power of any single legislative majority."
Rare. The word is usually uncountable, but the plural may refer to distinct forms or instances of bicameral government.
"The study compares the bicameralisms of several federal democracies."
Bicameralism turns legislation into a two-door affair: a proposal generally must pass both chambers before it becomes law.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bicameralism
Bicameralism was formed in English from Latin-derived elements meaning “two” and “chamber,” together with the adjectival suffix -al and the noun-forming suffix -ism. The underlying Latin word camera is also the source of chamber and camera, while bicameral is the direct adjectival formation associated with two-chamber institutions. The political sense developed as two-chamber legislatures became a subject of formal constitutional and political analysis.
Related word forms
How bicameralism is actually used
This is formal political-science and constitutional terminology. It describes an institutional arrangement rather than a particular legislature and is generally used in comparative discussion of governments.
Easily confused with bicameralism
Bicameralism is the system or principle of having two legislative chambers, whereas bicameral is the adjective describing a legislature or institution organized that way.