an assembly or council usually possessing high deliberative and legislative functions: such as the second chamber in the bicameral legislature of a major political unit (such as a nation, state, or province) —often used in capitalized form as the shortened name of a specific senate - the supreme council of the ancient Roman republic and empire. the hall or chamber in which a senate meets. a governing body of some universities charged with maintaining academic standards and regulations and usually composed of the principal or representative members of the faculty.