slope

slope (http://definr.com/slope)

     n 1: an elevated geological formation; "he climbed the steep
          slope"; "the house was built on the side of the
          mountain" [syn: incline, side]
     2: the property possessed by a line or surface that departs
        from the horizontal; "a five-degree grade" [syn: gradient,
         grade]
     v : be at an angle; "The terrain sloped down" [syn: incline, pitch]