<p><strong>Noun</strong></p><ul><li>an act of calling back.</li><li>a summoning of workers back to work after a layoff.</li><li>a summoning of an employee back to work after working hours, as for emergency business.</li><li>a request to a performer who has auditioned for a role, booking, or the like to return for another audition.</li><li>recall (def 12).</li><li>a return telephone call.</li><li>an allusion to a joke made earlier in the same comedy act or show: "The kitten yelling 'Quiet!' at the end was a callback to earlier in the episode when the two normally silent brothers shouted it."</li></ul><p><strong>Adjective</strong></p><ul><li>of or relating to a return telephone call: "Please leave a callback number."</li></ul><p><strong>Verb Phrase</strong></p><ul><li>to telephone (a person) who has called earlier: "Our staff will call you back within 24 hours."</li><li>to summon or bring back; recall: "He called back the messenger."</li><li>The actor was called back for a second audition.</li><li>to revoke; retract: "to call back an accusation."</li></ul><p><strong>End of Response</strong></p>