Deposition/ˌdepəˈzɪʃn/ Definition 1 of 4Pro Tip 1/3Legal Context Used in legal scenarios, often during trials or investigations. She prepared her deposition carefully with her lawyer. Pro Tip 2/3Sworn Evidence A deposition is treated like an oath; the person must tell the truth. He gave his deposition under oath at the courthouse. Pro Tip 3/3Pre-trial Procedure Often part of discovery, before the actual trial begins. The depositions provided crucial information for the case.