noun

• (uncountable) Loose stony debris on a slope.
  "To the north the towering scree-strewn slopes of Saddleback begin to draw nearer as we start the abrupt descent towards Keswick."
• (uncountable, by extension) Similar debris made up of broken building material such as bricks, concrete, etc.
  "Acres of the industrial port had been reduced to desolation, half-walls, half-chimneys, crazy sticks of steel that looped up out of concrete scree. The temptation not to clear and rebuild must have been strong."
• (countable) A slope made up of scree at the base of a cliff, mountain, etc.
  "The next landmark was an apachita 'cairn', at the top of a steep scree. Each pilgrim carried a stone to the summit, spat on it, and threw it on to the cairn — the purpose being, I was told, to relieve the soul of its sins […]"

noun

• (Scotland) A coarse sieve.
  "A contract of lease was entered into between the pursuer, who is the proprietor of the estate of Bargaddie, on the one part, and William M'Creath and others, carrying on business under the firm of the Bargaddie Coal Company, on the other part, […] and the lessees becoming bound to pay to the pursuer the sum of £500 sterling of fixed yearly rent, or, in his option, a lordship of 5½d. per cart of the gross output of coals, such cart weighing 13 cwt., and the coals being riddled through a riddle or scree of the customary size."