callback

noun

• 1an invitation to return for a second audition or interview.

• 2a telephone call made to return a call received.

• 3a recall of a defective product:ask which products have the most callbacks

• 4an emergency call summoning an employee to work after hours:uncontrolled air leakage results in increased callbacks

• 5 Computing a security feature used by systems accessed by telephone, in which a remote user must log on using a previously registered phone number, to which the system then places a return call.