The Collaborative International Dictionary
Interrogation \In*ter`ro*ga"tion\, n. [L. interrogatio: cf. F. interrogation.]
The act or process of interrogating or questioning; examination by questions; an instance of interrogating; inquiry.
A question put; an inquiry.
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A point, mark, or sign, thus [?], indicating that the sentence with which it is connected is a question. It is used to express doubt, or to mark a query. Usually called a question mark; called also interrogation point.
Note: In works printed in the Spanish language this mark is not only placed at the end of an interrogative sentence, but is also placed, inverted [as thus ([iques])], at the beginning.
Wiktionary
alt. A question mark. n. A question mark.
WordNet
n. a punctuation mark (?) placed at the end of a sentence to indicate a question [syn: question mark]
Usage examples of "interrogation point".
He was a living interrogation point, and repressed a rush of questions with a distinct effort.
His lordship was standing behind and a little to the left of the Italian, and, as Master Sean looked at both of them, Darcy traced an interrogation point in the air with a forefinger.
And Herbie's foot touched the first of the steps upward right smack on the interrogation point of that sentence.
He was conscious that Flamel was looking at him with the smile that was like an interrogation point.
All social problems erect their interrogation point around this chopping-knife.