n.[C]

1. 开启者
2. 开启的工具
   Can I borrow your can opener?

   可以借用你的开罐器吗？

3. （一系列事件的）开端
   the opener of a speech

   一篇讲演的开场白

4. 第一场比赛；（演出的）第一个节目

n.

1. a device for opening something:
   a tin opener.
2. a person or thing that opens or begins something, in particular the first goal in a match or a cricketer who opens the batting.