In*ter`ro*ga"tion (?), n. [L. interrogatio: cf. F. interrogation.]
The act of interrogating or questioning; examination by questions; inquiry.
A question put; an inquiry.
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. Called also interrogation point.
<-- usu. question mark. -->
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 (¿)], at the beginning.
© Webster 1913.