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mark someone down
[for a teacher] to give someone a low score. He'll mark you down for misspelled words. I marked down Tom for bad spelling.
mark something down
1. Lit. to write something down on paper. She marked the number down on the paper. She marked down the number.
2. Fig. to reduce the price of something. We are going to mark all this merchandise down next Monday. We marked down the merchandise.
Reduce the price of something, as in If they mark down these shoes, I'll buy two pairs. The mark here alludes to the label indicating a price. [Mid-1800s]
1. To write a description or symbol for something observed; make a note of something: I marked down the characteristics of every bird I saw in the woods. Did you mark the directions down?
2. To lower the price of something offered for sale: The department store marked down all of its shoes last week by 20 percent. The baker marks the bread down an hour before closing.