senate

noun3

1. •
   in some countries, the smaller and more senior of the two groups that make the laws
2. •
   A group of experienced, respected, wise individuals serving as decision makers or advisors in a political system or in institutional governance, as in a university, and traditionally of advanced age.

   • Before the Tyrant's throne All night his aged Senate sate. — 1818
3. •
   In Germany, the executive branch of government in the city states of Berlin, Bremen, and Hamburg; the governments of cities that were part of the Hanseatic League; and the bench in a higher appellate court.

noun1

1. •
   Any of several legislative bodies. (In countries which have multiple legislative bodies, the Senate is often the more senior.)