1. The act or process of questioning someone closely, often in an aggressive manner: The convicted murderer was under interrogation by the police detectives who were trying to determine what he did with the body of the victim.

Interrogations come in different settings and styles; such as, questionings, investigations, cross-examinations, or just simple inquiries.

2. A transmission of a signal to a computer, or the transmission of a signal to a device or computer program that triggers a response: The computer programmer was developing the interrogations that would provide the signals which would enhance the use of computers for users.