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Definition of Subpoena duces tecum
1. Noun. A writ issued by a court at the request of one of the parties to a suit; it requires a witness to bring to court or to a deposition any relevant documents under the witness's control. 
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1. Noun. A writ issued by a court at the request of one of the parties to a suit; it requires a witness to bring to court or to a deposition any relevant documents under the witness's control.