Slope

An oblique direction; a line or direction including from a horizontal line or direction; also, sometimes, an inclination, as of one line or surface to another.

Any ground whose surface forms an angle with the plane of the horizon.

Sloping.

In a sloping manner.

To form with a slope; to give an oblique or slanting direction to; to direct obliquely; to incline; to slant; as, to slope the ground in a garden; to slope a piece of cloth in cutting a garment.

To take an oblique direction; to be at an angle with the plane of the horizon; to incline; as, the ground slopes.

To depart; to disappear suddenly.

the property possessed by a line or surface that departs from the horizontal; "a five-degree gradient"

an elevated geological formation; "he climbed the steep slope"; "the house was built on the side of a mountain"