1 the Senate : the smaller group of the two groups of people who meet to discuss and make the laws of a country, state, etc.
▪ the New York State Senate ; especially : the smaller group of the two groups that form the U.S. Congress
▪ The Senate approved the bill. ▪ The Senate voted to repeal the tax cut. — often used before another noun ▪ The Senate bill was approved. ▪ the Senate race ▪ the Senate majority leader ▪ a Senate aide — compare house of representatives 2 [count] : a group of people who govern some colleges and universities 3 the Senate : the group of officials who led the ancient Roman government