Slope (?), n. [Formed (like abode fr. abide) from OE. slipen. See Slip, v. i.] 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.
Slope of a plane(Geom.), the direction of the plane; as, parallel planes have the same slope.