|ˈkɔːlbæk| noun 1. Countable(returning phone call) 回电话 huí diànhuà 2. Countable and uncountable(ringing back) 回叫 huíjiào 3. Countable and uncountableComputing 身份验证 shēnfèn yànzhèng 4. Countable especially American (for audition, interview) 再次面试 zàicì miànshì 5. Countable(recall) 召回 zhàohuí