subpena (subpoena)

Definition from Nolo’s Plain-English Law Dictionary

A court order issued at the request of a party requiring a witness to testify, produce specified evidence, or both. A subpena can be used to obtain testimony from a witness at both depositions (testimony under oath taken outside of court) and at trial. Failure to comply with the subpena can be punished as contempt of court.

Definition provided by Nolo’s Plain-English Law Dictionary.