1. a social or business visitor;

   "the room was a mess because he hadn't expected company"
   

2. an investor who buys a call option

3. the bettor in a card game who matches the bet and calls for a show of hands

4. a person who announces the changes of steps during a dance;

   "you need a fiddler and a caller for country dancing"
   

5. someone who proclaims or summons in a loud voice;

   "the callers were mothers summoning their children home for dinner"
   

6. the person who convenes a meeting;

   "who is the caller of this meeting?"
   

7. the person initiating a telephone call;

   "there were so many callers that he finally disconnected the telephone"
   

1. providing coolness;

   "a cooling breeze"
   "`caller' is a Scottish term as in `a caller breeze'"
   

2. fresh;

   "caller fish"
   

1.打电话的人
Acaller is a person who is making a telephone call.

e.g. An anonymouscaller told police what had happened.
有人打匿名电话向警方报告了所发生的事。

2.来访者;探望者
Acaller is a person who comes to see you for a short visit.

e.g. She ushered her callers into a cluttered living-room.
她把来人领进凌乱不堪的客厅。

1. 调用方：根 据前提条件来判断,检查的义务无疑落在调用方(caller). 如果责任划分不明确,则我们或者需要设置太多的检查--每一方都要检查,或者需要太少的检查--每一方都期望对方进行检查. 检查太多是很糟糕的,因为它会造成大量重复的代码,

2. 调用程序：举例,有调用程序(caller)和被调用程序(Callee),两者间调用接口用的参数list是P.caller没有把P内的Pi域中的初值设定为'0',所以Callee侧是异常操作. 二、 构建对等网文件共享系统的激励机制. 这一部分首先分析了P2P网络中参与者之间对网络资源的竞争关系,

3. 打电话者：而 Forgotten 的栏位则是会显示家 庭成员应该携带而不在身上的物品.图 12 物品备忘系统介面 3.4 网路电话服务 [7] 网路电话服务能够依情境提供无所不在的服务,例如:当家中没有人时电话响了,妙管家主动 检查打电话者(caller)的身份,发现是阿公打电话来,