The definition of slope is to slant up or down, or to put something into a position where it slants up or down.(verb)
When a line goes from high to low, this is an example of slope.
Slope is defined as a surface where one end is higher than the other. It is also the difference in the angles of the surface.(noun)
An example of slope is the amount by which a surface veers downward.
See slope in Webster's New World College Dictionary
Origin: ME < aslope, sloping (mistaken as a slope) < OE aslopen, pp. of aslupan, to slip away < slupan, to glide: see sloop
See slope in American Heritage Dictionary 4
verb sloped sloped, slop·ing, slopes verb, intransitive
Origin: Probably from Middle English aslope, sloping.
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