Callback (noun)

1. A return call made by an operator or agent to a customer or prospect in response to an inquiry or application.
2. A feature in computer programming where a function is passed as an argument to another function to be called later.

Origin:

Back + call.

Examples:

1. The customer service representative made a callback to the customer.
2. The sales representative made a callback to the prospect.
3. The callback was in response to the customer's inquiry.
4. The callback feature allows for a function to be passed as an argument to another function to be called later.
5. The callback function was used to update the status of the application.