As a Noun: 1. An arrangement that you make when you book something such as a theatre seat or a hotel room. English = reservation, booking. As a Verb or Adjective: 1. To arrange to have or use something (such as a hotel room, or a ticket for something) at a particular time. English = reserve, book. 2. Of things such as a hotel room, a seat at the theatre, or a table at a restaurant, to be taken or claimed by someone else for future use. English = (be) reserved, (be) booked.