Slope n.
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.).
3. The part of a continent descending toward, and draining to, a particular ocean; as, the Pacific slope.
Note: ☞ A slope, considered as descending, is a declivity; considered as ascending, an acclivity.
Slope of a plane Geom., the direction of the plane; as, parallel planes have the same slope.