noun | \ ˌde-pə-ˈzi-shən \ | de·po·si·tion
a : a statement that is made under oath by a party or witness (as an expert) in response to oral examination or written questions and that is recorded by an authorized officer (as a court reporter); broadly : affidavit : affidavit
b : the certified document recording such a statement — compare interrogatory
: the hearing at which a deposition is made the deposition takes place where the deponent answers the questions —Federal Rules of Civil Procedure Rule 30(b)(4)
Note: A deposition can be used as a method of discovery, to preserve the testimony of a witness who is likely to become unavailable for trial, or for impeachment of testimony at trial. Depositions are distinguished from affidavits by the requirement that notice and an opportunity to cross-examine the deponent must be given to the other party.