名詞 callback:

1. a request by the manufacturer of a defective product to return the product (as for replacement or repair)
   同義詞：recall

1. The computerized phone has a callback facility.
   計算機(jī)化的電話有回叫裝置。

call.back

n.（名詞）
The act or an instance of calling back from one location or situation to the previous one:
召回：從某一地點(diǎn)或形勢下返回到先前的動作或事件：
例句：
a callback of laid-off auto workers.
召回解雇的汽車工人

A return telephone or radio call.
回答信號：返回的電話或無線電傳呼
A recall of a recently sold product by the manufacturer to correct a defect.
收回維修：由制造者為校正缺點(diǎn)而收回最近售出的產(chǎn)品