1. in a poor, unsatisfactory, or inadequate manner
2. to a great degree; very much
3. in a way that causes harm or damage

Examples

• She performed badly on the test.
• The team played badly and lost the game.
• I badly need a vacation.
• He was badly injured in the accident.
• The car was badly damaged in the crash.
• The project was badly managed from the start.
• She badly wanted to win the competition.