1 [countable usually plural, uncountable]TT
things painted or written on something, especially something such as an aircraft, road, vehicle etc:
The marking on the road is unclear.
strange markings on the walls of the cave
2 [countable usually plural, uncountable]
the coloured patterns and shapes on an animal's fur, on leaves etc:
This dolphin is noted for its distinctive black and white markings.
the vivid markings of the angelfish
3 [uncountable] especially British English
the activity of checking students' written work [= grading American English]
I have to do a lot of marking tonight.
the setting and marking of exams