0 to arrange for someone to stay at a hotel: --
I've booked you in at the Savoy.
They've booked us into the hotel in the main square.
1 to arrange for someone to stay at a hotel, have an appointment, etc. at a time in the future: --
I booked myself in at the dentist's for a check-up.
They've booked us in at the Grand Hotel in the main square.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
book sb in/book sb into sth