A more thorough explanation:

Definition: A legal request to cancel, invalidate, or nullify a previous court order or subpoena.

Example 1: A defendant in a criminal case may file a motion to quash a subpoena for their personal records if they believe it violates their Fourth Amendment rights against unreasonable search and seizure.

Example 2: A company may file a motion to quash a subpoena for their confidential business documents if they believe it would harm their competitive advantage or reveal trade secrets.

Both examples illustrate how a motion to quash is a legal tool used to challenge or cancel a previous court order or subpoena. It is often used to protect a person's rights or interests, such as privacy or business confidentiality.