noun
plural hills
[count] :a usually rounded area of land that is higher than the land around it but that is not as high as a mountain
[count] :an area of sloping ground on a road, path, etc.
[count] :a pile of something :heap, mound
the Hill US informal - used to refer to the U.S. Congress
a hill of beans
chiefly US informal :something that has little or no value - used in negative statements
over the hill
informal :old and no longer successful, attractive, etc.