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A senate is a deliberative assembly, often the upper house or chamber of a legislature or parliament. There have been many such bodies in history, since senate means the assembly of the eldest and wiser members of the society and rulling class. Two of the first official senates were the Greek Senate (????????) and the Roman Senate.

The modern word senatorial is derived from the Latin word sen?tus (senate), which comes from senex, "old man" . The members or legislators of a senate are called senators. The Latin word senator was adopted into English with no change in spelling. Its meaning is derived from a very ancient form of simple social organization in which decision-making powers are reserved for the eldest men. For the same reason, the word senate is correctly used when referring to any powerful authority characteristically composed by the eldest members of a community, as a deliberative body of a faculty in an institution of higher learning is often called a senate. The original senate was the Roman Senate, which lasted until 580. In the Eastern Roman Empire, the Byzantine Senate continued until the Fourth Crusade.

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