A sign-in book is the book visitors write their names in on arrival. Fill in the sign-in book, sign the sign-in book, the sign-in book at reception.
It exists chiefly so that a fire warden knows who is in the building. Screens have replaced it in most large offices, though small ones keep the book.
1nounsign-in bookThe book visitors write their names in on arrival.
“He wrote the wrong date in the sign-in book and nobody noticed.”
sign-in book is a book.
Practised in Office & Admin