【俚語】
1.(在旅館)登記入住;(在門診部)掛號
【例句】
When you check in or check into a hotel or clinic, or if someone checks you in, you arrive and go through the necessary procedures before you stay there.
I'll ring the hotel. I'll tell them we'll check in tomorrow...
我來給旅館打電話,通知他們我們明天入住。
2.(在機場)辦理登機手續,檢票登機