In computer programming, a callback, also known as a "call-after" function, is any executable code that is passed as an argument to other code; that other code is expected to call back the argument at a given time.

What's the meaning of callback?

1 : a return call. 2a : recall sense 5. b : a recall of an employee to work after a layoff.

What happens at a callback?

A callback is an invitation to the actor, from the director of a show, to take the next step down the audition path. It means that the director has seen something in an actor that they liked and wants to see them again.