Definition from Nolo’s Plain-English Law Dictionary
Preprinted sets of questions that one party in a lawsuit asks an opposing party during the discovery process. Form interrogatories cover the issues commonly encountered in the kind of lawsuit at hand. For example, there are form interrogatories designed for contract disputes, landlord-tenant cases, personal injury cases, and others. Form interrogatories are often supplemented by specific questions written by the lawyers about the specific issues in the particular case.