1. 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.
2. Any ground whose surface forms an angle with the plane of the horizon. buildings the summit and slope of a hill. (Macaulay) Under the slopes of Pisgah. (Deut. Iv. 49. (rev. Ver))
A slope, considered as descending, is a declivity; considered as ascending, an acclivity.
(Science: geometry) Slope of a plane, the direction of the plane; as, parallel planes have the same slope.
Origin: Formed (like abode fr. Abide) from OE. Slipen. See Slip.