[1] : The Collaborative International Dictionary of English v.0.48

slope \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.
      1913 webster

   2. any ground whose surface forms an angle with the plane of
      the horizon.
      1913 webster

            buildings the summit and slope of a hill.
                                                  --macaulay.
      1913 webster

            under the slopes of pisgah.           --deut. iv.
                                                  49. rev.
                                                  ver..
      1913 webster

   3. the part of a continent descending toward, and draining
      to, a particular ocean; as, the pacific slope.
      webster 1913 suppl.

   note: a slope, considered as descending, is a declivity;
         considered as ascending, an acclivity.
         1913 webster

   slope of a plane geom., the direction of the plane; as,
      parallel planes have the same slope.
      1913 webster
see also:
slip slope of a plane 

Plane >> P Words
Plane, definition of term: Plane
plane_pag1.html

Plane Table >> P Words
Plane Table, definition of term: Plane Table
plane+table_pag1.html

Jack Plane >> J Words
Jack Plane, definition of term: Jack Plane
jack+plane_pag1.html

Inclined Plane >> I Words
Inclined Plane, definition of term: Inclined Plane
inclined+plane_pag1.html

Ground Plane >> G Words
Ground Plane, definition of term: Ground Plane
ground+plane_pag1.html