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to indicate that one has arrived somewhere and at what time by signing a piece of paper or a list. Please sign in so we will know you are here. Did you remember to sign in this time?
sign someone in
to record that someone has arrived somewhere and at what time by recording the information on a paper or a list. I will sign you in. What is your name? Do I have to sign in everyone?
sign something in
to record that something has been received at a particular time by recording the information on a paper or a list. I have to sign this package in, then I will be right with you. should I sign in this shipment now?
to write your name on an official list when entering a place Messengers are required to sign in at the front desk.Opposite of: sign out
Usage notes: sometimes used in the form sign someone in (to write someone's name on an official list when they enter a place): An elegantly dressed young woman signed us in at the door.
Record one's arrival by signing a register, as in He signed in both himself and his wife. [c. 1930] For the antonym, see sign out.
1. To record the arrival of someone by signing a register: We went to the front desk to sign in. I got to the hotel first and signed us in.
2. To provide the necessary information to a computer for someone to be allowed to access computer resources: I signed in on the bank's website and checked my account statement. I'll sign you in using my password so you can access the website's subscriber features.