callback
/ˈkɔːlbæk/noun
1
- chiefly N. Amer. an invitation to return for a second audition or interview〈主北美〉复试。
2
- a telephone call made to return one that someone has received回电话。
3
- mass noun a security feature used by some computer systems accessed by telephone, in which a user must log on from a previously registered phone number, to which the system then places a return call回叫（某些通过电话访问的计算机系统的安全设置, 用户必须用预先注册的电话号码登录, 然后系统再回电话接通）。