Meaning of “mark” - Learner’s Dictionary

mark

noun uk us /mɑːk/
AREA [ C ]

B2 an area of dirt, damage, etc that is left on something:

You've got a black mark on your nose.
He's left dirty marks all over the carpet.
SCORE [ C ]

A2 mainly UK a number or letter that is written on a piece of work, saying how good the work is:

She always gets good marks in English.
LEVEL [ no plural ]

a particular level, degree, distance, etc:

They've just passed the 5000m mark.
Interest rates are somewhere around the seven percent mark.
a mark of sth

a sign or proof that something exists:

a mark of genius
There was a minute's silence everywhere as a mark of respect.

(Definition of “mark noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)