mountain in the Black Hills, W S.Dak., on which are carved huge heads (60 ft, 18 m, high) of U.S. presidents Washington, Jefferson, Lincoln, & Theodore Roosevelt: 6,200 ft (1,890 m)
Origin:
after C. E. Rushmore, N.Y. mining attorney
See Rushmore in American Heritage Dictionary 4
A mountain, 1,708 m (5,600 ft) high, in the Black Hills of western South Dakota. Its monument with massive carved likenesses of Washington, Jefferson, Lincoln, and Theodore Roosevelt was carved under the direction of Gutzon Borglum.