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

2. (n.) A question put; an inquiry.

3. (n.) 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.

Socratic method asking bone of contention bringing into question catechetical method catechism catechization catechizing challenge cross-examination cross-interrogatory cross-question debating point demand dispute examination feeler grilling inquiring inquiry inquisition interpellation interrogative interrogatory investigation issue leader leading question moot point point at issue point in question probing problem pumping query querying question question at issue question mark questioning quiz quizzing quodlibet seeking third degree topic trial balloon vexed question