- [美国英语]
- (在旅馆、机场、大会等处)办理登记手续；记录；报到：
We checked in at the airport an hour before our plane took off.
我们在飞机起飞前一小时到达机场办理登机手续。
- [口语]到达：
The friends they had invited did not check in until Wednesday.
他们邀请的朋友到星期三才到达。
- 报到上班，签到：
What time do you have to chcek in?
你什么时候该签到上班?
- 办归还手续；登记收回：
She put the novel on the library desk, and the librarian checked it in.
她把小说放在图书馆的柜台上，馆员将它登记收回。
I'm just going to check in these books at the library.
我正打算去图书馆办理归还这些书的手续。
- 交运(行李等)：
You must check your luggage in before noon.
你必须在中午以前将行李交运。
- 寄存(提包等)：
She checked her suitcase in at the service desk.
她在服务台把手提箱寄存起来。
- [俚语]死去