v.1. To succeed just barely in managing or surviving, especially despite severely limited resources: When I was out of work, my family and I barely scraped by. We scraped by on just $3 a day.
2. To succeed at a level of minimal acceptability: The student just scraped by with a D average.
3. To succeed just barely in passing some obstacle, such as a competition or evaluation: The tennis player scraped by the third round with a narrow victory.