"scree : (uncountable) Loose stony debris on a slope. (uncountable, by extension) Similar debris..."

“scree : (uncountable) Loose stony debris on a slope.
(uncountable, by extension) Similar debris made up of broken building material such as bricks, concrete, etc.
(countable) A slope made up of loose stony debris at the base of a cliff, mountain, etc.
Today is designated by the United Nations General Assembly as International Mountain Day to highlight the importance of sustainable mountain development.”

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