1. an act of calling back.
  2. a summoning of workers back to work after a layoff.
  3. a summoning of an employee back to work after working hours, as for emergency business.
  4. a request to a performer who has auditioned for a role, booking, or the like to return for another audition.
  5. recall(def 12).
  6. a return telephone call.


  1. of or relating to such a call: Please leave a callback number.

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