callback

1. The return of a situation to a previous position or state; a reference to such a position or state.
2. A return telephone or radio call; especially one made automatically to authenticate a logon to a computer network.
3. A product recall because of a defect or safety concern.
4. A function pointer passed as an argument to another function.
5. A follow-up audition in casting.
6. A follow-up interview in employment recruiting.
7. A joke which references an earlier joke in the same routine.
8. A form of audience participation in which the audience shout lines in response to the dialog of a film.

Plural callbacks