1. (Of a reply to a question, esp. from a witness under oath) not directly answering the question asked.
2. Patents. (Of a patent applicant’s answer) not addressing every rejection, objection, and requirement contained in a patent examiner’s office action. • A nonresponsive reply may render an application abandoned. 37 CFR § 1.111. [Cases: Patents 104. C.J.S. Patents §§ 145–147, 149–151, 173–175.]