1. To make a thin shallow cut or mark on (a surface) with a sharp instrument.
2. To use the nails or claws to dig or scrape at.
3. To rub or scrape (the skin) to relieve itching.
4. To scrape or strike on an abrasive surface.
5. To write or draw (something) by scraping a surface: scratched their initials on a rock.
6. To write or draw hurriedly: scratched off a thank-you note.
7.
a. To strike out or cancel (a word, for example) by or as if by drawing lines through.
b. Slang To cancel (a project or program, for example).
8. To withdraw (an entry) from a contest.