Capitol Hill noun
Learner's definition of CAPITOL HILL
[singular]
: the group of people who make the federal laws in the United States : the U.S. Congress国会山（指美国国会） ◊ The U.S. Congress is called Capitol Hill because that is the name of the area in Washington, D.C., where the Capitol building is located.美国国会被称为国会山，因为国会大厦坐落在华盛顿特区的国会山。