Definition of slope noun from the Oxford Advanced American Dictionary

      

    slope

     noun
    noun
    NAmE//sloʊp//
     
     
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  1. 1[countable] a surface or piece of land that slopes (= is higher at one end than the other) synonym incline a grassy slope The town is built on a slope.
  2. 2[countable, usually plural] an area of land that is part of a mountain or hill the eastern slopes of the Andes ski slopes He spends all winter on the slopes (= skiing ).
  3. 3[singular, uncountable] the amount by which something slopes a gentle/steep slope a slope of 45 degrees the angle of slope Because of the slope of the roof, the snow cannot accumulate.
  4. Idioms
    the/a slippery slope
     
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    a course of action that is difficult to stop once it has begun, and can lead to serious problems or disaster She realized he was on the slippery slope toward a life of crime.
See the Oxford Advanced Learner's Dictionary entry: slope