(a) geri çağırmak.
He was about to leave when his secretary called him back. (b) tekrar uğramak/ziyaret
etmek.
The salesman will call back later. (c) karşılık vermek, cevaben telefonla aramak, sonra telefon etmek.
I'll call you back: Sana sonra telefon ederim. (d)
call back to someone: dönüp birini çağırmak, bağırarak birine cevap vermek.
I called back: “Don't forget!”