book verb definition in Staying in a hotel topic from the Oxford Advanced Learner's Dictionary

book

 verb: Staying in a hotel topic
[intransitive, transitive] to arrange to have or use something on a particular date in the future; to buy a ticket in advance Book early to avoid disappointment. book something She booked a flight to Chicago. The performance is booked up (= there are no more tickets available). I'm sorry—we're fully booked. (British English) I'd like to book a table for two for 8 o'clock tonight.