callback definition | Dictionary.com

callback - 4 dictionary results

call⋅back

[kawl-bak]

–noun

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.

–adjective

7.	of or pertaining to such a call: Please leave a callback number.

Also, call-back.

Origin:
1925–30; n. use of v. phrase call back

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re⋅call

[v. ri-kawl; n. ri-kawl, ree-kawl for 7–9, 12, 13; ree-kawl for 10, 11]

–verb (used with object)

1.	to bring back from memory; recollect; remember: Can you recall what she said?

2.	to call back; summon to return: The army recalled many veterans.

3.	to bring (one's thoughts, attention, etc.) back to matters previously considered: He recalled his mind from pleasant daydreams to the dull task at hand.

4.	International Law. to summon back and withdraw the office from (a diplomat).

5.	to revoke or withdraw: to recall a promise.

6.	to revive.

–noun

7.	an act of recalling.

8.	recollection; remembrance.

9.	the act or possibility of revoking something.

10.	the removal or the right of removal of a public official from office by a vote of the people taken upon petition of a specified number of the qualified electors.

11.	Also called callback. a summons by a manufacturer or other agency for the return of goods or a product already shipped to market or sold to consumers but discovered to be defective, contaminated, unsafe, or the like.

12.	a signal made by a vessel to recall one of its boats.

13.	a signal displayed to direct a racing yacht to sail across the starting line again.

Origin:
1575–85; re- + call

Related forms:

re⋅call⋅a⋅ble, adjective

Synonyms:
1. See remember. 5. rescind, retract, recant, repeal; annul. 7. memory. 9. revocation, retraction, repeal, withdrawal, recantation; nullification.

Antonyms:
1. forget.

Link To callback

call·back (kôl'bāk')

The act or an instance of calling back from one location or situation to the previous one: a callback of laid-off auto workers.
A return telephone or radio call.
A recall of a recently sold product by the manufacturer to correct a defect.

callback
1. A scheme used in event-driven programs where the program registers a subroutine (a "callback handler") to handle a certain event. The program does not call the handler directly but when the event occurs, the run-time system calls the handler, usually passing it arguments to describe the event.
2. A user authentication scheme used by some computers running dial-up services. The user dials in to the computer and gives his user name and password. The computer then hangs up the connection and uses an auto-dial modem to call back to the user's registered telephone number. Thus, if an unauthorised person discovers a user's password, the callback will go, not to him, but to the owner of that login who will then know that his account is under attack.
However, some PABXs can be fooled into thinking that the caller has hung up by sending them a dial tone. When the computer tries to call out on the same line it is not actually dialing through to the authorised user but is still connected to the original caller.
3. cost control callback.
(2003-07-13)

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