Noun

• S: (n) slope, incline, side (an elevated geological formation) "he climbed the steep slope"; "the house was built on the side of a mountain"
• S: (n) gradient, slope (the property possessed by a line or surface that departs from the horizontal) "a five-degree gradient"

Verb

• S: (v) slope, incline, pitch (be at an angle) "The terrain sloped down"