In law, cross-examination is the interrogation of a witness by one's opponent. It is preceded by direct examination and may be followed by a redirect. A redirect examination, performed by the attorney or pro se individual who performed the direct examination, clarifies the witness' testimony provided during cross-examination including any subject matter raised during cross-examination but not discussed during direct examination. Recross examination addresses the witness' testimony discussed in redirect by the opponent. Depending on the judge's discretion, opponents are allowed multiple opportunities to redirect and recross examine witnesses.

In law, a witness is someone who, either voluntarily or under compulsion, provides testimonial evidence, either oral or written, of what they know or claim to know.