verb (used without object), sloped, sloping.
to have or take an inclined or oblique direction or angle considered with reference to a vertical or horizontal plane; slant.
to move at an inclination or obliquely: They sloped gradually westward.
verb (used with object), sloped, sloping.
to direct at a slant or inclination; incline from the horizontal or vertical: The sun sloped its beams.
to form with a slope or slant: to slope an embankment.
ground that has a natural incline, as the side of a hill.
inclination or slant, especially downward or upward.
deviation from the horizontal or vertical.
an inclined surface.
Usually, slopes. hills, especially foothills or bluffs: the slopes of Mt. Kilimanjaro.
the tangent of the angle between a given straight line and the x- axis of a system of Cartesian coordinates.
the derivative of the function whose graph is a given curve evaluated at a designated point.
Slang: Disparaging and Offensive. an Asian, especially a Vietnamese.
slope off, Chiefly British Slang. to make one's way out slowly or furtively.

1495–1505; aphetic variant of aslope; akin to slip1

slopingly, adverb
slopingness, noun
unsloped, adjective
unsloping, adjective

1. Slope, slant mean to incline away from a relatively straight surface or line used as a reference. To slope is to incline vertically in an oblique direction: The ground slopes (upward or downward ) sharply here. To slant is to fall to one side, to lie obliquely to some line whether horizontal or perpendicular: The road slants off to the right. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
slope (sləʊp)
1.  to lie or cause to lie at a slanting or oblique angle
2.  (intr) (esp of natural features) to follow an inclined course: many paths sloped down the hillside
3.  (intr; foll by off, away, etc) to go furtively
4.  (tr) military (formerly) to hold (a rifle) in the slope position (esp in the command slope arms)
5.  an inclined portion of ground
6.  (plural) hills or foothills
7.  any inclined surface or line
8.  the degree or amount of such inclination
9.  maths
 a.  (of a line) the tangent of the angle between the line and another line parallel to the x-axis
 b.  the first derivative of the equation of a curve at a given point
10.  (formerly) the position adopted for British military drill when the rifle is rested on the shoulder
11.  slang, derogatory (US) a person from Southeast Asia, especially a Vietnamese
[C15: short for aslope, perhaps from the past participle of Old English āslūpan to slip away, from slūpan to slip]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1590s, from earlier adj. meaning "slanting" (c.1500), probably from M.E. aslope (adv.) "on the incline" (late 15c.), from O.E. *aslopen, pp. of aslupan "to slip away," from a- "away" + slupan "to slip" (see sleeve). The noun is first recorded 1610s, from the verb. Derogatory
slang meaning "Oriental person" is attested from 1948.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The shelf ends at a break, where the increased steepness is defined as the
  continental slope.
Finally she planted agaves, aloes, and other species to cover the slope without
  blocking ocean views.
Slope also affects airflow: warm air rises, cold air sinks.
Supply curves in economics still slope upward regardless of who is doing the
Image for slope
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