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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Sloping \Slop"ing\, a. Inclining or inclined from the plane of the horizon, or from a horizontal or other right line; oblique; declivous; slanting. -- Slop"ing*ly, adv.

The sloping land recedes into the clouds. --Cowper.

Source: Webster's Revised Unabridged Dictionary (1913)