Definition: A callback is a reference a comedian makes to an earlier joke in a set. Callbacks are usually made in a different context and remind the audience of an earlier joke, creating multiple layers and building more than one laugh from a single joke. When used at the end of a set, callbacks can bring a comic's routine full circle and give closure to the set.
Also Known As: call back
The comic ended her set with a callback to her earlier joke about Disney World.