IPA: /ˈkɔːl.bæk/
KK: /ˈkɔlˌbæk/
A situation where someone is called back, often referring to a return call or the act of recalling something or someone.
The company issued a callback for the defective product to ensure customer safety.
Callback → It is formed from "call" (from Old English *ceallian*, meaning to cry out or summon) and "back" (from Old English *bæc*, meaning the rear or reverse side). The word "callback" refers to a return call or a call made back to someone.
Think of someone 'crying out' ('call') and then doing it 'again' in the 'reverse' direction ('back') — that's why a callback means returning a call.