| Term | Definition |
|---|---|
| Quash | To vacate or void a summons, subpoena, etc. |
| Qui tam action | Shorthand for "qui tam pro domino rege quam pro seipse", meaning "he who as much for the king as himself." Action by a private individual with knowledge of a fraud on the government to sue for damages. |
| Quid pro quo | The giving of one valuable thing for another. |
| Quiet Title Action | Removing a cloud from title by court action. |
| Quit claim | Giving up one's claim or title. |