Definition
to record someone's name in a log in order to allow them to access a building like an office or hotel.
記下名字；登記簽到
Please sign in at the front desk so we can allow you inside.
請在前台登記，這樣我們才能讓您進入。
All visitors must sign in upon entry; it's part of our security policy.
所有訪客必須在進入時登記；這是我們安全政策的一部分。
Please make sure to sign in outside the meeting room so we can count the attendance.
請務必在會議室外登記，這樣我們才能統計出席人數。