ring back

Từ điển Oxford Advanced Learner 8th

ˌring ˈback | ˌring sbˈback derived
(BrE)to telephone sb again, for example because they were not there when you called earlier, or to return a call they made to you
•He isn't here now— could you ring back later?
•I'll ask Simon to ring you back when he gets in.
Main entry: ↑ring_derived