1.
If you mark something down, you write it down.
I tend to forget things unless I mark them down...
As he marks down the prices, he stops now and then to pack things into a large bag.
PHRASAL VERB: V n P, V P n (not pron)
2.
If you mark someone down as a particular type of person, especially a type that you do not like, you consider that they have the qualities which make them that type of person.
If he’d taken that five pounds, I would have marked him down as a greedy fool...
PHRASAL VERB: V n P as n
3.
To mark an item down or mark its price down means to reduce its price.
A toy store has marked down the Sonic Hedgehog computer game...
Clothes are the best bargain, with many items marked down.
= reduce
? mark up
PHRASAL VERB: V P n (not pron), V-ed P, also V n P
4.
If a teacher marks a student down, the teacher puts a lower grade on the student’s work because of a mistake that has been made.
If you mark each other’s work, they don’t mark you down because then you can mark them down.
PHRASAL VERB: V n P