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general::
Phrase(s): ring someone back
to call someone back on the telephone. • I will have to ring back the store at a later time. • Please ring me back when you have a moment., Phrase(s): ring back
to call back on the telephone. • No, there’s no message. I’ll ring back later. • She’s not here now. I suggest you ring back after dinner.
McGrawhill's American Idioms And Phrasal Verbs