Senate

Any of several legislative bodies. (In countries which have multiple legislative bodies, the Senate is often the more senior.)

Proper noun

Any of several legislative bodies. (In countries which have multiple legislative bodies, the Senate is often the more senior.)
The council that governed the ancient Roman Republic.
The Senate of Canada; the upper house of the Canadian parliament; "the Senate".
The United States Senate.
The upper legislative body of many of the states of the United States.
The upper house of the Philippine Congress.