mark somebody/something ↔ down phrasal verb ( see also ↑ mark )
1 . to write something down, especially in order to keep a record:
Mark down everything you eat on your daily chart.
mark somebody/something down as something
The teacher marked him down as absent.
2 . to reduce the price of something OPP mark up ⇨ markdown :
Winter coats have been marked down from $80 to $50.
3 . especially British English to give a student a lower result in a test, paper etc because they have made mistakes:
Students will be marked down for failing to follow directions.