1. 收回(某物)：call in question 对...表示怀疑 | call in 收回(某物) | call off 叫走,叫开;取消

2. 召来,召集：call for 提倡,号召,需要 | call in 召来,召集 | call on 拜访,访问

3. 召集：81.cut off切断; | 82.call in召集; | 83.cut through剪断、穿过;

1. (听众、观众参与的)电话热线节目,互动节目
A call-in is a programme on radio or television in which people telephone with questions or opinions and their calls are broadcast.

e.g. ...a call-in show on Los Angeles radio station KABC.
洛杉矶KABC广播电台播出的听众热线节目

noun

1. a telephone call to a radio station or a television station in which the caller participates in the on-going program