"interrogation" in the noun sense
1. question, interrogation, interrogative, interrogative sentence
a sentence of inquiry that asks for a reply
"he asked a direct question"
"he had trouble phrasing his interrogations"
2. interrogation
a transmission that will trigger an answering transmission from a transponder
3. interrogation, examination, interrogatory
formal systematic questioning
4. question, inquiry, enquiry, query, interrogation
an instance of questioning
"there was a question about my training"
"we made inquiries of all those who were present"
Source: WordNet® (An amazing lexical database of English)
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