Senate

n. parliament, legislature, council of citizens with lawmaking and deliberative functions (esp. the U.S. Senate); house of parliament, building or hall in which a legislative body meets (esp. the chamber of the U.S. Senate)

A senate is a deliberative body, often the upper house or chamber of a legislature. There have been many such bodies in history, the first of which was the Roman Senate.
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Noun
1. the upper house of the United States Congress
(synonym) United States Senate, US Senate
(member-holonym) Congress, United States Congress, U.S. Congress, US Congress

Noun
1. assembly possessing high legislative powers
(hypernym) legislature, legislative assembly, general assembly, law-makers
(hyponym) United States Senate, US Senate, Senate

n. senate, parliament, house of representatives; council of citizens with lawmaking and deliberative functions (during the Roman Empire); house of parliament, building or hall where a legislative body meets

(n.)
The upper and less numerous branch of a legislature in various countries, as in France, in the United States, in most of the separate States of the United States, and in some Swiss cantons.
  

(n.)
The governing body of the Universities of Cambridge and London.
  

(n.)
In some American colleges, a council of elected students, presided over by the president of the college, to which are referred cases of discipline and matters of general concern affecting the students.
  

(n.)
In general, a legislative body; a state council; the legislative department of government.
  

(n.)
An assembly or council having the highest deliberative and legislative functions.
  

(n.)
A body of elders appointed or elected from among the nobles of the nation, and having supreme legislative authority.