1. [countable] a phone call that you make to somebody who has just called youTopics

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2. Callbackâ„¢, ringback
   [uncountable, countable] a phone service that you can use if you call somebody and their phone is being used, so that your phone will ring when the line is free; a call made using this service
3. [uncountable, countable] (computing) a process by which the user of a computer or phone system proves their identity by contacting a computer, which then contacts them
4. [countable] (especially North American English) an occasion when you are asked to return somewhere, for example for a second interview when you are trying to get a job

[TahlilGaran] English Dictionary ▲