What does unicameral mean?
Unicameral describes a legislature or other representative body composed of a single chamber. In a unicameral system, all members deliberate and vote together in one house, rather than dividing their work between separate upper and lower chambers. The term is especially associated with countries and territories whose legislatures have one house, including examples such as New Zealand, Sweden, and Denmark, although institutions with the same structure exist in many other jurisdictions. The word combines the Latin prefix uni-, meaning “one,” with a form related to camera, Latin for “chamber.” Its use is chiefly formal and institutional: writers say “unicameral legislature,” “unicameral parliament,” or “unicameral system.” The term is also used more broadly for any body organized around a single chamber. It should not be confused with unicellular, which concerns biological cells rather than governing bodies.
adjectiveConsisting of or relating to a single legislative chamber. A unicameral parliament or legislature has one house rather than two.
- Having one legislative chamber, as in a unicameral parliament or legislature.
"The small island nation maintained a unicameral parliament with representatives elected from its districts."
"The proposal was debated in the country's unicameral legislature."
"The committee considered whether the regional council should become a unicameral body."
Some parliaments sit in one chamber; others split the work across two. Unicameral gives that single-chamber system its name.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of unicameral
Unicameral was formed in English from Latin unus, meaning “one,” and camera, meaning “chamber” or “vaulted room.” English forms such as chamber and cameral developed through the same Latin word, while related forms including bicameral and tricameral add numerical prefixes to indicate the number of chambers. The compound is especially associated with institutional descriptions of governments and legislatures.
How unicameral is actually used
This is primarily a formal political and institutional term. It is most often applied to legislatures, parliaments, chambers, and systems of government.
Easily confused with unicameral
Unicameral means having one legislative chamber, whereas unicellular means consisting of or relating to a single cell.