1. (传唤某人出庭作证的)传票
A subpoena is a legal document telling someone that they must attend a court of law and give evidence as a witness.

2. (以传票)传唤…出庭作证;要求当庭出示(证据)
If someone subpoenas a person, they give them a legal document telling them to attend a court of law and give evidence. If someone subpoenas a piece of evidence, the evidence must be produced in a court of law.

1. a writ issued by court authority to compel the attendance of a witness at a judicial proceeding
disobedience may be punishable as a contempt of court

Synonym: subpoena ad testificandum