interrogation

(noun) a sentence of inquiry that asks for a reply. Synonyms: question, interrogative, interrogative sentence. Examples: "He asked a direct question." "He had trouble phrasing his interrogations."

(noun) a transmission that will trigger an answering transmission from a transponder.

(noun) formal systematic questioning. Synonyms: examination, interrogatory.

(noun) an instance of questioning. Synonyms: question, inquiry, enquiry, query. Examples: "There was a question about my training." "We made inquiries of all those who were present."