| 1. | to fail in a course or examination. |
| 2. | to fail to get a passing mark in: to flunk math. |
| 3. | to give a failing grade to; remove (a student) as unqualified from a school or course. |
| 4. | a failure, as in a course or examination. |
| 5. | flunk out, to fail and be unable to continue in: He flunked out of flight school. |