: to preserve or make available (testimony) for later use at a trial by means of deposition esp. when the evidence so gathered would be otherwise unavailable or lost NOTE: Courts will not allow the perpetuation of testimony at a pretrial proceeding if it appears to be an attempt to fish for useful material.
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.