noun: 1. an inquiry or interrogation. 2. the action of asking someone questions, especially in an official context: the young lieutenant escorted us to the barracks for questioning. 3. the raising of a doubt about or objection to something: this situation should prompt questioning; there was no questioning of the decision. adjective: 1. indicating or implying a question: a questioning tone in her voice. 2. characterized by or indicating intellectual curiosity; inquiring: an alert and questioning mind. 3. proceeding from or characterized by a feeling of doubt or uncertainty. 4. enthusiastic or eager for philosophical or other investigations; intellectually stimulated: an alert and questioning mind. 5. showing an interest in learning new things: the questioning mind of a child. 6. (of a look) suggesting that information is sought: he shot her a questioning glance. Related Words: examination, inquisition, inquest, inquiring, catechism. Note 1: Merriam-Webster does not have the word "questioning." Note 2: This entry was made because "questioning" is a related word for "inquiry." —12.27.19. Origin: First recorded in 1795–1805; question + -ing2, -ing1. See question. Source 1, Source 2.