From The Collaborative International Dictionary of English v.0.48 :
Slope \Slope\, v. t. [imp. & p. p. Sloped; p. pr. & vb. n.
Sloping.]
To form with a slope; to give an oblique or slanting
direction to; to direct obliquely; to incline; to slant; as,
to slope the ground in a garden; to slope a piece of cloth in
cutting a garment.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
sloped
adj 1: having an oblique or slanted direction [syn: aslant,
aslope, diagonal, slanted, slanting, sloped,
sloping]