English Reference
Noun

callback

n. countable
B2 Upper Intermediate US /ˈkɔɫˌbæk/ UK /kˈɔːlbæk/ call·back UK spelling callbacks Business Programming Theater

n.A piece of code you give to a program to run later, usually after it finishes a specific job or when something special happens.

n.A function passed as an argument to another function, intended to be executed after a specific event occurs or an asynchronous task completes. This allows for non-blocking code execution.


SIMPLE

The program uses a callback to show a message after the file downloads.

CONTEXTUAL

When the user clicks the button, the browser triggers a callback function to update the screen.

COMPLEX

By passing a callback into the data request, the developer ensures the interface only refreshes once the server responds, though you might also hear the term used for a return phone call.

Usage

Commonly used in the context of recruitment, performing arts, and telecommunications.

This entry
Level B2 · Upper Intermediate
Frequency Occasional
Updated