book in/into phr v 1 [I] BrE to arrive at a hotel, sign your name, collect your key etc; CHECK IN 【英】 〔在旅馆〕办理入住登记手续: I'll call you as soon as I've booked in. 我一办完登记手续就会打电话给你。 2 [T book sb ↔ in/into] to arrange for someone to stay at a hotel 为〔某人〕预订旅馆房间: She's booked you in at the Hilton. 她已在希尔顿饭店为你预订了房间。