Demurrer to Interrogatory Law and Legal Definition

Demurrer to interrogatory is a reason offered by a witness for refusing to answer a question. It is the reasons which a witness tenders for not answering a particular question in interrogatories. The courts are judicially to determine their validity. The witness must state his objection very carefully, for these demurrers are held to strict rules, and are readily overruled if they cover too much.