Meaning of “scratch” - Learner’s Dictionary

scratch

verb uk us /skrætʃ/
RUB SKIN [ I, T ]

B2 to rub your skin with your nails, often to stop it itching (= feeling unpleasant):

My skin was so itchy, I was scratching all night.
He scratched his head.
HURT/DAMAGE [ T ]

B2 to make a slight cut or long, thin mark with a sharp object:

The surface was all scratched.
I scratched myself on the roses.
RUB SURFACE [ I, T ]

B2 to rub a hard surface with a sharp object, often making a noise:

I could hear the cat scratching at the door.

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