callback
callback Lexical Profile
callback Game Scores & Validity
• noun
A return telephone call made in response to an earlier call or message.
"The customer service representative promised a callback within twenty-four hours to resolve the billing issue."
An invitation for an actor, musician, or job applicant to return for a second or subsequent audition or interview.
"After a strong initial audition, the young actress was thrilled to receive a callback from the casting director."
In comedy and storytelling, a joke or reference that alludes to something mentioned earlier in the performance or series.
"The season finale featured a clever callback to a minor joke from the pilot episode."
In computer programming, a function passed as an argument to another function, to be executed after a specific event or task completes.
"The developer registered an asynchronous callback to handle the server response once the data finished loading."
A manufacturer's recall of a defective product for repair or replacement, or a summons for an employee to return to work.
"The automotive manufacturer issued an immediate callback after discovering a fault in the braking system."
Word Nuance & Usage
The closed compound noun 'callback' refers to a return phone call or follow-up audition, whereas the two-word phrasal verb 'call back' is used for the action itself (e.g., 'I will call back later').