In*ter`ro*ga"tion (?), n. [L. interrogatio: cf. F. interrogation.]

1. The act of interrogating or questioning; examination by questions; inquiry.

2. A question put; an inquiry.

3. 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.

&fist; 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.

• 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.