Also found in: Thesaurus, Encyclopedia.
1. Of, relating to, or having the function of an inquisitor.
2. Law Relating to a legal proceeding in which the judge is both actively involved in determining the facts and in deciding the outcome.
3. Extremely inquisitive or prying: "a sharp inquisitorial gaze" (Michael Chabon).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.