[uncountable] the activity of asking somebody questions He was taken to the police station for questioning. They faced some hostile questioning over the cost of the project.Extra examples On closer questioning, I discovered that his whole story had been a lie. She decided to confront her boss about the situation with direct questioning. The disaster prompted questioning about safety standards. The group chairman faced hostile questioning from angry shareholders. The man was released after questioning by detectives. The prime minister faced tough questioning about his plans. The suspect remained silent under questioning.